What Is a Missionary? Simple Guide for Kids & Families

A missionary is a person sent by God, through a church, to share the good news of Jesus Christ with people who have not yet heard it. The word comes from the Latin missio, meaning “sending.” Missionaries live among the people they serve — learning their language, sharing their meals, and building relationships — so that every nation, tribe, and tongue can hear the gospel in their own heart language.

The woman was covered in red dust from the ankles down. She had walked four miles from the nearest paved road to reach the village, carrying a canvas bag with a solar-powered speaker, a laminated picture book, and a thermos of tea she had made that morning in a kitchen that smelled like cardamom and kerosene. Her name was Rachel. She was thirty-one years old. She had a master’s degree in linguistics and a scar on her left knee from falling off a motorbike in Laos. She wore a hand-woven sinh, the traditional Lao skirt, in indigo and gold. Her hair was pulled back with a cloth tie she had bought at the morning market.

Rachel was a missionary.

But she did not look the way most people imagine missionaries look. She was not standing on a stage with a microphone. She was not handing out pamphlets at a bus station. She was sitting cross-legged on a bamboo floor, eating sticky rice with her fingers alongside a Khmu grandmother named Kham, laughing at a joke she only half-understood because her Khmu was still better at verbs than punchlines. She had been living in this village for three years. She ate what the village ate. She wore what the village wore. She woke when the roosters crowed and hauled water from the same well as everyone else. She had chosen, deliberately and joyfully, to make her life look like the lives of the people she had come to serve.

So what is a missionary? If your family is beginning to explore teaching kids about world missions, this is the place to start. Because the answer is simpler than most people think, and more beautiful than most people realize.

What Does the Word “Missionary” Mean?

The word missionary comes from the Latin word missio, which means “sending.” A missionary is someone who is sent. That is it. Not someone who is especially brave, though many are. Not someone who is unusually talented, though some are. A missionary is a person who has been sent by God, through a church, to carry the good news of Jesus Christ to people who have not yet heard it.

The Bible uses a similar word. In the New Testament, the Greek word apostolos means “one who is sent.” When Jesus chose his twelve disciples and sent them out to preach, heal, and teach, he was making them missionaries. When the church in Antioch laid hands on Paul and Barnabas and sent them across the Mediterranean, they were commissioning missionaries. The pattern has never changed. God calls. The church sends. The missionary goes.

And here is what makes a Christian missionary different from anyone else who travels to another country to help: a missionary goes not primarily to build schools or dig wells or teach English, though they often do all of those things. A missionary goes because God is not yet worshiped among a particular people, and that silence is the most urgent problem in the universe. There is a place in the hills of northern Laos, among the bamboo forests and the morning mist and the sound of the Mekong at dawn, where the God who made all of it has not yet been named by the people who wake to that sound every morning. The missionary goes to fill that silence with worship.

What Does the Bible Say About Missionaries?

The idea of sending did not start with the Great Commission. It started in Genesis.

When God called Abraham in Genesis 12:1-3, he made a promise that would echo through the rest of the Bible: “I will bless you… and in you all the families of the earth shall be blessed.” God chose one family, not so they could keep the blessing for themselves, but so they could carry it to every other family on earth. The whole Bible is the story of that blessing making its way outward, from one family to one nation to every nation, tribe, people, and language.

The Psalms are full of it. “Declare his glory among the nations, his marvelous works among all the peoples!” (Psalm 96:3, ESV). The prophets are full of it. “I will make you as a light for the nations, that my salvation may reach to the end of the earth” (Isaiah 49:6, ESV). Jonah was sent to Nineveh. Ruth the Moabite was woven into the very bloodline of Jesus. The Bible is not a book about one people. It is a book about all peoples.

Then Jesus stood on a mountain and said the words that have sent two thousand years of missionaries into the world: “All authority in heaven and on earth has been given to me. Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age” (Matthew 28:18-20, ESV).

Notice what Jesus said first: “All authority.” He did not say “good luck.” He did not say “try your best.” He said: all authority, everywhere, in heaven and on earth, belongs to me. The mission will succeed because of who commands it. This is not a risky venture. It is a guaranteed outcome. The only question is whether we will have the joy of being part of it.

The early church took those words seriously. In Acts 13, the church at Antioch was worshiping and fasting when the Holy Spirit said, “Set apart for me Barnabas and Saul for the work to which I have called them.” The church did not send Paul and Barnabas alone. They fasted, prayed, laid hands on them, and sent them together. The church sends. This is how it has always worked. A missionary is not a freelancer. A missionary is an ambassador sent by a community of believers who stand behind them with prayer, money, and love.

Paul later wrote one of the clearest descriptions of why missionaries exist: “How then will they call on him in whom they have not believed? And how are they to believe in him of whom they have never heard? And how are they to hear without someone preaching? And how are they to preach unless they are sent? As it is written, ‘How beautiful are the feet of those who preach the good news!’” (Romans 10:14-15, ESV). There it is. The chain of sending. God calls. The church sends. The missionary goes. The people hear. Faith is born.

What Is a Missionary in the Bible?

The word missionary never appears in the Bible. But the Bible is full of missionaries. The clearest examples are three men whose lives together form a complete picture of what missionary work looks like: Paul, Barnabas, and Timothy. Every kind of missionary who has ever served — from Hudson Taylor to Amy Carmichael to the woman down the red-dust road in Laos — is walking in the footsteps of these three.

Paul: The Pioneer

Paul is the Bible’s primary model of what John Piper calls a “frontier missionary” — a person whose ambition is to preach the gospel “where Christ has not been named, lest I build on someone else’s foundation” (Romans 15:20, ESV). Paul did not go where the church already existed. He went where it did not exist yet. He walked into cities where no one had ever heard the name of Jesus, and he left behind churches full of new believers with new leaders.

This is a crucial distinction. Not every Christian is called to do what Paul did. As Piper has argued, if everybody is called a missionary, the word loses its meaning, and the specific work of reaching the unreached — the peoples and places where Christ has never been named — gets lost in the shuffle. Paul’s calling was specific: cross into territory where the gospel has not gone. Plant the church where it does not yet exist. Appoint local leaders to carry it forward (Titus 1:5). Then move on. Paul was not a pastor. He was a sent one — an apostolos — whose life was consumed by the frontier.

The church at Antioch understood this. In Acts 13:2-3, while they were worshiping and fasting, the Holy Spirit said, “Set apart for me Barnabas and Saul for the work to which I have called them.” The church did not hand Paul a plane ticket and wish him well. They fasted. They prayed. They laid hands on him. They sent him as their representative, backed by their prayers and their resources. This is the biblical pattern that J. Keith McKinley of The Southern Baptist Theological Seminary describes when he writes that a missionary is “a servant of Christ, a messenger called and set apart for the gospel among the nations” — and that setting missionaries apart “protects missions from the flattening effect of asserting that everyone is a missionary.” The church confirms. The church sends. The missionary goes.

Paul also adapted his approach to every audience he encountered. Tim Keller observes that in the book of Acts, Paul preached differently to Bible-believing Jews in the synagogue than he did to pagan philosophers on Mars Hill (Acts 17) or to peasant polytheists in Lystra (Acts 14). He did not change the gospel. He changed how he communicated it, because he understood that the same truth must be translated into the language and thought-world of every people. This is contextualization, and it is at the heart of every faithful missionary’s work.

Barnabas: The Encourager

Barnabas was not the pioneer Paul was. He was something equally essential: the encourager who made the pioneer’s work possible.

His real name was Joseph, but the apostles called him Barnabas, which means “Son of Encouragement” (Acts 4:36). When no one in the Jerusalem church trusted the newly converted Paul — and why would they, since he had been hunting Christians — it was Barnabas who brought Paul to the apostles and vouched for him (Acts 9:27). Without Barnabas, Paul might never have been accepted by the very church that would later send him.

When the church in Jerusalem heard that Gentiles in Antioch were coming to faith, they sent Barnabas to investigate. He could have been suspicious. Instead, “when he came and saw the grace of God, he was glad, and he exhorted them all to remain faithful to the Lord with steadfast purpose” (Acts 11:23, ESV). Then he did something remarkable: he went to Tarsus, found Paul, and brought him to Antioch to teach alongside him for a full year (Acts 11:25-26). Barnabas saw what Paul could become and pulled him into the work.

Later, Barnabas and Paul parted ways over a young man named John Mark, who had deserted them on their first journey. Paul refused to take Mark again. Barnabas refused to give up on him. They disagreed sharply and separated (Acts 15:36-41). Barnabas took Mark and mentored him — and that same John Mark went on to write the Gospel of Mark. Barnabas saw potential in people others had written off. Every missions team needs a Barnabas: someone who encourages, who mentors, who sees in a young believer what that young believer cannot yet see in himself.

Timothy: The Multiplier

Timothy represents the next generation. Paul met him in Lystra — a young man whose mother Eunice and grandmother Lois had taught him the Scriptures from childhood (2 Timothy 1:5, 3:15). Paul saw something in Timothy and recruited him for the team (Acts 16:1-3). Timothy was young. He was sometimes timid. Paul had to write to him, “Let no one despise you for your youth” (1 Timothy 4:12, ESV). But Timothy became Paul’s most trusted co-laborer, the person Paul called “my true child in the faith” (1 Timothy 1:2).

What makes Timothy essential to the story of missions is one verse: “What you have heard from me in the presence of many witnesses entrust to faithful men, who will be able to teach others also” (2 Timothy 2:2, ESV). Count the generations: Paul taught Timothy. Timothy was to teach faithful men. Those faithful men were to teach others. Four generations of multiplication in a single sentence. This is the engine of missions. The gospel does not spread because one extraordinary person reaches a million people. It spreads because one person teaches another, who teaches another, who teaches another. The missionary multiplies.

Timothy also shows us what Piper calls “the Timothy-type” — a missionary who does not push into entirely new frontier territory the way Paul did, but who goes cross-culturally to strengthen and build up young churches. Paul sent Timothy to Ephesus (1 Timothy 1:3) not to pioneer but to pastor, to correct false teaching, to train elders, to build what Paul had planted. Both types are essential. Paul breaks the ground. Timothy tends the garden. Without both, the harvest fails.

The Pattern

These three men reveal a pattern that has repeated itself in every century since. The pioneer goes where the gospel has not yet been heard. The encourager builds the team and believes in people the world overlooks. The multiplier invests deeply in the next generation so the work outlasts any single life. Every missionary in history — William Carey translating the Bible into Bengali, Lottie Moon welcoming Chinese families into her home, Gladys Aylward leading a hundred orphans over the mountains — was a Paul, or a Barnabas, or a Timothy, or some combination of all three.

Piper writes, “Missions exists because worship doesn’t.” Tim Keller adds that “God is a sending God, and the gospel produces good deeds.” The Bible’s missionaries were not superhuman. They were sent ones. Called by God, confirmed by the church, compelled by the knowledge that somewhere in the world there are people who have never heard the name that is above every name. The mission that began with Paul and Barnabas walking out of Antioch has not stopped. It is still going. And God is still calling Pauls, Barnabases, and Timothys to carry it forward.

Why Do Missionaries Go?

This is the question that matters most, and children are exactly old enough to hear the honest answer.

Missionaries go because there are people in the world who have never had the chance to hear about Jesus. Not because they rejected him. Not because they chose something else. But because no one has ever told them. Jim Elliot understood this when he walked onto a sandbar in Ecuador to reach the Waodani people, knowing the danger and going anyway because they had never heard the name of Jesus. There are over 7,400 unreached people groups on earth, communities where fewer than 2 percent of the population follow Jesus. That is approximately 3.3 billion people. Nearly half the world.

But missionaries do not go simply because people are uninformed. They go because God’s glory is at stake. Every people group on earth was created to display a unique facet of who God is. The way a Fulani woman in Nigeria sings praise is not the way a Quechua grandmother in Peru sings praise. The way a Japanese father teaches his children to bow in reverence is not the way an Inuit hunter in northern Canada drops to his knees in the snow. God made this diversity on purpose. He wants worship from every tongue, not because he needs it, but because his glory is too vast to be expressed by only one culture, one language, one way of seeing the world.

When a people group has never heard the gospel, there is a silence in the universe where their worship should be. A voice God made for praise, singing a song that does not yet know its own melody. The missionary goes to bring the melody. To understand the full biblical foundation for why missionaries are sent, from Genesis 12 through Revelation 7, read our guide to Great Commission Bible verses.

What Do Missionaries Actually Do?

This is where most kids are surprised. Because what missionaries do every day is not what most movies or books would have you believe. Here is what Rachel’s ordinary Tuesday looks like in Laos:

She learns the language. Every single day. Rachel has been studying Khmu for three years and still makes mistakes. She mispronounces tones and accidentally says the word for “buffalo” when she means “bridge.” The Khmu women laugh with her, not at her. Language learning is the most unglamorous and most essential thing a missionary does. You cannot share the deepest truths of God in a language you learned from a textbook. You need the language of lullabies, the language people think in and dream in and whisper secrets in. That takes years.

She lives among the people. Rachel does not live in a compound behind walls. She lives in a village house with a bamboo floor and a tin roof. She eats sticky rice and laap and morning glory stir-fried with garlic. She fetches water. She helps thresh rice during harvest. She has calluses on her hands. She chose, deliberately, to make her life look like the lives of her neighbors. This is not poverty tourism. This is incarnation. Hudson Taylor did the same thing in China over a century ago — he shaved his head, wore Chinese clothing, and ate Chinese food so the gospel would arrive in a voice the people recognized. The same way Jesus left heaven and became a human being, walking our roads and eating our food and sleeping under our sky, a missionary leaves home and becomes a neighbor. The missionary lives among the people, works alongside them, like them, never above them.

She builds relationships. Rachel’s closest friend in the village is Kham, a sixty-three-year-old grandmother who knows every medicinal plant in the forest. Rachel has spent hundreds of hours with Kham, cooking together, walking together, sitting in silence together during the rainy season when the trails turn to mud and there is nothing to do but wait. Trust is not built in a day. It is built in a thousand ordinary days.

She tells the story. When the time is right, when trust has been earned, when the language is sufficient, Rachel opens the picture book and tells the story. Creation. Fall. Rescue. Restoration. She tells it in Khmu, in Kham’s heart language, using words that Kham’s mother used to sing her to sleep. And sometimes, not always, but sometimes, Kham looks up and says, “Tell me more.”

She prays. Every morning before the village wakes. Every night after the village sleeps. Rachel prays for the Khmu the way a soldier operates a wartime walkie-talkie: not casually, not as a formality, but as someone who knows the battle is real and the Commander is listening. When your family prays for unreached people groups, you are doing the same thing Rachel does. You are fighting in the same war.

Types of Missionaries

Not every missionary looks like Rachel. The work of missions takes many forms, and every one of them matters.

Church planters go to places where there is no church and start one. They gather the first believers, teach them the Bible, baptize them, train leaders, and eventually hand the church over to local pastors. The goal is always an indigenous church, one that belongs to the people, led by the people, sustained by the people, not dependent on outsiders.

Bible translators take the Scriptures and put them into languages that have never had a written Bible. This is painstaking work. A single New Testament can take fifteen to twenty-five years to translate. Over 1,600 languages still have no Scripture at all. A Bible translator might spend an entire afternoon finding the right word for “grace” in a language that has no direct equivalent.

Medical missionaries bring healthcare to places where hospitals do not exist. Doctors, nurses, dentists, and public health workers serve communities while also sharing the love of Christ. A medical missionary might deliver a baby in the morning and teach a Bible story in the afternoon.

Teachers and educators run schools, literacy programs, and vocational training. In many unreached communities, education is the door that opens every other door. A teacher who also loves Jesus can change a village in a generation.

Tentmakers are missionaries who support themselves through secular jobs. The term comes from the apostle Paul, who made tents to fund his missionary travels (Acts 18:3). Today, tentmakers work as engineers, business owners, IT professionals, or English teachers in countries that do not grant missionary visas. They live and work alongside the people, and they share the gospel through their presence and their relationships.

Aviation and logistics missionaries fly planes, drive trucks, and run supply chains to get other missionaries, Bibles, and medical supplies to remote areas. Without them, many of the most isolated communities in the world would be unreachable.

Every type matters. Every role fills a gap. If your family wants to explore how kids can participate in this work right now, even from home, read our guide on how kids can be senders.

What Is a Missionary Trip?

You may have heard the term “mission trip” and wondered how it differs from long-term missionary work. A mission trip is a short-term journey, usually one to three weeks, where a group travels to another country or community to serve. Mission trips often involve construction projects, medical clinics, children’s programs, or evangelism.

Mission trips are valuable. They open eyes, build compassion, and give families a taste of cross-cultural ministry. Many long-term missionaries trace their calling back to a short-term trip they took as a teenager. But a mission trip is not the same as missionary life. A two-week trip cannot replace years of language learning, relationship building, and patient presence. The most important missionary work is the slow, unglamorous, daily kind. It is Rachel eating sticky rice with Kham for the thousandth time, still listening, still learning, still there.

If your church is planning a mission trip, go. Take your kids if you can. But let it be the beginning, not the whole story.

What Is the Purpose of a Missionary?

The purpose of a missionary is not to make other cultures look like Western culture. It is not to export American Christianity or European traditions. The purpose of a missionary is to bring the gospel of Jesus Christ to a people group in their own language, in their own cultural context, so that an indigenous church can be born and grow and thrive without outside help.

The best missionaries make themselves unnecessary. They do not create dependency. They build up local leaders, hand over responsibility, and step back. Amy Carmichael spent fifty-five years in India without a single furlough, rescuing children and raising local leaders who carried the work forward long after she was gone. The healthiest churches in the formerly “unreached” world are the ones where the missionary is no longer needed, where local pastors preach in the local language, where local elders lead, where local believers give and serve and send their own missionaries to the next unreached group.

This is God’s design. The church at Antioch was not planted by an American. It was planted by unnamed believers scattered by persecution (Acts 11:19-21). The Ethiopian eunuch carried the gospel back to Africa without a missionary escort (Acts 8:26-39). God’s plan has always been for the gospel to move through local people, in local languages, within local relationships.

The missionary is the spark. The local church is the fire.

From Our Family to Yours: We Were Missionaries

We can tell you what a missionary is because we were ones.

Our family — Hannah and Sean Hagarty, with seven of our ten children still at home — moved to West Asia to serve among unreached people groups. We packed up our lives, learned a new language, navigated a new culture, and watched our kids adapt to a world that looked nothing like the one they were born into. We ate unfamiliar food. We stumbled through conversations. We built friendships that crossed every boundary we had ever known. We prayed in a land where the name of Jesus was rarely spoken aloud.

And then, due to a family crisis, we came home.

Coming back was not the end of the story. It was a new chapter. Because here is something most people do not realize: the work of missions does not belong only to the people who go. It belongs equally to the people who send. Paul wrote in Romans 10:15, “How are they to preach unless they are sent?” The sender and the goer are partners in the same mission. Neither can succeed without the other.

Hannah wrote about this for Missionary.com in her article “Why Sending Isn’t a Consolation Prize.” In it, she describes how a ten-dollar monthly gift from an elderly widow in our sending church pushed our family to work harder at language learning and cultural engagement — because someone back home was sacrificing for us, and we owed it to her to give everything we had. As 3 John 5 says, senders are “fellow workers for the truth.”

Today, our family supports missionaries financially, prays for them daily, and creates resources — including Wonder Letters and this site — to help other families raise the next generation of world-changers. Sending is not a consolation prize. It is one of the most joyful things we have ever done.

We wrote this guide because we want your family to see what we saw: that God’s heart for the nations is not an abstract idea. It is a fire that burns in real places, among real people, and it is big enough to include your family — whether God calls you to go or to send.

Can Kids Be Missionaries?

Yes. Not someday. Now.

Every child who tells a friend about Jesus is doing the work of a missionary. Every child who prays for an unreached people group is doing the work of a missionary. Every child who writes a letter to a missionary family, or saves allowance money for a Bible translation project, or colors a page showing a family from an unreached people group and prays for them by name (our Christian coloring pages are a simple place to start), is being shaped into the kind of person God uses to fill the silence with worship.

You do not need a plane ticket. You do not need a seminary degree. You need a heart that says, “God, I want your glory to be known among every people on earth, and I want to be part of making that happen.”

If that is your heart, you are already a missionary. The rest is geography.

Some of you will grow up and go. Some of you will stay home and send. Both matter. Both are essential. Romans 10:15 asks, “How can anyone preach unless they are sent?” The sender and the goer are partners in the same mission. Neither can do the work without the other.

To learn more about specific people groups your family can pray for, explore our people group profiles. Each one tells the story of a real community, their food, their language, their daily life, and how your family can pray for them by name.

How Do You Explain Missions to a Child?

The simplest explanation is the truest one: God loves every person in the world, and some of those people have never heard about Jesus. A missionary is someone God sends to tell them.

That is enough for a three-year-old. A five-year-old can add a layer: there are people groups, whole communities, where no one has ever heard the gospel. Not because they said no, but because no one has gone to tell them yet. A seven-year-old can understand the chain of sending from Romans 10: God calls, the church sends, the missionary goes, the people hear, faith is born. A ten-year-old can learn names — the Fulani of Nigeria, the Baloch of Pakistan, the Thai of Thailand — and pray for them by name.

Here are five ways to make missions real for your family:

1. Pray for one unreached people group each week. Pick a people group from our people group profiles, read their story together, and pray for them every night before bed. By the end of a year, your family will have prayed for fifty-two communities that most Christians have never heard of.

2. Color a missionary hero. Our Christian coloring pages include pages of Hudson Taylor, Amy Carmichael, Jim Elliot, and more. While your child colors, tell the story. A child who colors a missionary is inhabiting that missionary’s world for twenty minutes, and twenty minutes is long enough for a story to take root.

3. Read missionary biographies together. Our missionary heroes series tells the stories of twelve men and women who gave their lives to carry the gospel across cultures. Start with one. Read it over dinner. Let your kids ask questions.

4. Write a letter to a missionary family. If your church supports missionaries overseas, ask for their address. A hand-drawn picture from a six-year-old can sustain a missionary through a hard week. If you want something that arrives monthly, Wonder Letters brings a new unreached people group to your family’s mailbox every month — learn more and subscribe here.

5. Use meals as a bridge. Cook a dish from another culture and talk about the people who eat it every day. Our recipes from unreached nations include meals from across the globe, each paired with the story of a people group. A child who eats Iraqi chai and prays for the Iraqi Arabs is doing missions at the kitchen table.

The goal is not to overwhelm your children with statistics or guilt. The goal is to widen their world until it looks the way God sees it: every nation, every tribe, every people, every language, all of them beloved, all of them worth reaching.

Rachel and Kham

It has been three years since Rachel walked down that red-dust road for the first time. The road has not changed. The dust still clings to everything below the knee. The bamboo forests still creak in the afternoon wind. The Mekong still runs brown and wide through the valley below.

But something has changed.

On a Tuesday morning in March, Kham asked Rachel to tell the story again. Not the creation story. Not the flood story. The one about the man who died on the cross. Kham had heard it before, many times, over many months, in her own language, in words that sounded like the ones her mother used to sing her to sleep.

This time, Kham was quiet for a long time. Then she said something Rachel will never forget.

“I think he did that for me.”

Rachel did not jump up and shout. She did not hand Kham a pamphlet or ask her to sign a card. She sat on the bamboo floor and held Kham’s weathered hands and they cried together, because the silence was breaking, and the song was beginning, and the God who made the bamboo forests and the morning mist and the sound of the Mekong at dawn was being named, for the first time, by a woman who had been waiting her whole life to hear his voice.

That is what a missionary does. That is why they go.