What Is a Missionary?

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.

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. 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. 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. 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.

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 learns three facts about a country they have never visited, 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.

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.