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Working in Missions

Lesson 13 · Quarter 3 2026 · 09/13/2026 · 16 min read

By Equipe Marcas Editora

The video has automatic English dubbing. If you hear Portuguese, open the player settings (⚙) → Audio track → English.

Golden Text

“How then can they call on the One in whom they have not believed? And how can they believe in the One of whom they have not heard? And how can they hear without someone to preach?” (Romans 10:14, BSB) · Read in the Bible

The last lesson of the quarter wraps up everything the class has learned about the church and shows why the church exists: the mission. The study separates two things that are almost always confused — evangelism is the act of proclaiming; missions is the entire work of the organized church to take and sustain the Gospel where it has not yet reached, which includes going, sending, supporting, praying, and discipling. From the chain in Romans 10:13-15, the student discovers that God chose to reach people through people who go, and that the offer of salvation is for everyone who calls on Him. It also makes clear where the mission field of an 11- or 12-year-old student is: the school, the street, and the home they already pass through — never with a stranger, never alone, and never with a quota of souls.

Think about the path you take every day. From your home to school. From the school gate to your classroom. From the classroom to recess. From school back home.

Now count, roughly, how many people you pass along that route. Ten? Thirty? A hundred?

Every day, you already walk through a mission field — and you probably never realized it.

This is the last lesson of the quarter. For thirteen weeks we studied the church: what it is, who the pastors are, what elders, deacons, and church workers do, what the spiritual gifts are, and how the body works together. And an honest question hangs in the air: so what?

So what is that none of this exists out of curiosity. The church does not organize itself just to look nice on the inside. It organizes itself because it has a mission — and today we are going to talk about it.

I — Missions is not the same thing as evangelism

Last Sunday the subject was evangelism. Today it is missions. It sounds like the same class with another name. It is not.

Evangelism is the act of proclaiming the message of salvation. You tell someone, right there, on the spot. It is specific, it is direct, and any Christian does it.

Missions is bigger. It is the entire work of the organized church to take and sustain the Gospel where it has not yet arrived. Notice how many pieces this has:

  • someone goes — leaves where they were and settles in another place;
  • someone sends — the church decides to send them, and takes responsibility;
  • someone supports — the home base works, the missionary eats, the work continues;
  • someone prays — every day, by name;
  • and those who believe are discipled, not abandoned halfway along the road.

Evangelism fits inside missions. Missions is the umbrella.

And there are two types, two different addresses:

Local mission is close by. It is your street, your neighborhood, your city. It is your church's evangelistic outreach in the square, at the street market, on the avenue. It is the neighbor your family knows.

Cross-cultural mission is crossing over. It is leaving your culture and entering another — another country, another state, another people, another language, another way of living. The cross-cultural missionary has to learn to speak in a way that those people understand, and that takes time.

Both are missions. Neither one is a second-class version of the other.

II — A command is a command, and it does not depend on a single verse

Before ascending to heaven, Jesus left the same instruction recorded in four different places. It is not a loose note; it is the closing of the Gospel.

"Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey all that I have commanded you. And surely I am with you always, even to the end of the age." (Matthew 28:19-20)

"And He said to them, “Go into all the world and preach the gospel to every creature.”" (Mark 16:15)

"Again Jesus said to them, “Peace be with you. As the Father has sent Me, so also I am sending you.”" (John 20:21)

And in Acts 1:8 He promises the power of the Holy Spirit and says that they would be witnesses in Jerusalem, in Judea, in Samaria, and to the ends of the earth. Luke 24:46-48 repeats the same thing in other words.

Four records. One single command.

Notice what is not written in any of them. It is not written "go if you can make it." It is not written "go if you think it is cool." It is not written "go if you have a calling for it." Jesus did not make an invitation for excited volunteers — He gave a command to the whole church.

αβ In the original — Greek. In Matthew 28:19, the word translated "go" is a participle, and many understand its force as "going", "as you go". That does not loosen the command — it is still a command. It changes the address: the "go" does not start when you buy a ticket; it starts on the path you already walk. And notice another word: in Romans 10:15, "sent" comes from the Greek verb apostéllo, the same root from which we get apostle — which means, simply, sent one. Our word "mission" came from the Latin mittere, which also means to send. Apostle and missionary are the same idea in two languages: people who are sent.

III — The chain of Romans 10

Now comes the heart of the lesson, and it is a line of reasoning that Paul builds backward. Read it slowly.

"for, “Everyone who calls on the name of the Lord will be saved.”" (Romans 10:13)

"How then can they call on the One in whom they have not believed? And how can they believe in the One of whom they have not heard? And how can they hear without someone to preach? And how can they preach unless they are sent? As it is written: “How beautiful are the feet of those who bring good news!”" (Romans 10:14-15)

Put it in the order in which it actually happens:

SEND → PREACH → HEAR → BELIEVE → CALL → BE SAVED

It is a chain. And a chain has an uncomfortable feature: it is only as strong as its weakest link. Take away any one of them and the last one does not happen.

Notice what Paul is saying. God is almighty and could have chosen any method — He could have written in the sky, He could have sent an angel, He could have spoken directly into each person's ear. He chose to arrive through people who go. That is why missions is not an optional department of the church. It is the way God decided to reach the world.

And pay attention to two words in verse 13: everyone who. It is not "some". It is not "those chosen beforehand, and only them". The offer is real and it is for anyone who calls — Paul had just said that there is no difference between Jew and Greek (Romans 10:12).

But the offer being for everyone does not mean that everyone says yes. Three verses later Paul writes that not all have obeyed the gospel (Romans 10:16). It is possible to hear and refuse. It is possible to receive grace and turn your back on it. If it were not possible, that sentence would make no sense.

Put the two things together and you have the whole lesson: God offers salvation to everyone who calls on Him, and He chose to make that offer arrive through the mouths of ordinary people. Someone has to go. If no one goes, someone is left without hearing.

That is why verse 15 ends by talking about feet. Not a pretty voice, not a diploma, not talent: feet. The part of the body that walks. Isaiah had said the same thing centuries earlier, celebrating how beautiful on the mountains are the feet of the one who brings good news (Isaiah 52:7).

IV — Knees, hands, and feet

There is an old saying that sums up how missionary work functions in practice: missions are done with the knees of those who pray, with the hands of those who give, and with the feet of those who go.

Three pillars. None of them is just for decoration.

Going. It is leaving where you are to proclaim the message somewhere else. It can be on the other side of the world and it can be three blocks from your house, in your church's evangelistic outreach. At your age, your "going" happens together with your church and with your parents — and that is truly going, not going halfway.

Giving. It is the money that supports those who went. A missionary eats, pays rent, needs supplies, needs to come home sometimes. Someone pays that bill, and the one who pays is just as much a part of the work as the one who travels. But listen carefully: this is not a demand placed on you. A student has no income, and the Bible never measured anyone by the size of what they gave. If one day you are able to give, great. If you cannot, you are not left out.

Praying. This is the pillar that is entirely within your reach, today, without depending on anything else. And it is not a consolation prize for those who cannot do the rest — look at what Jesus said right when He appointed seventy disciples and sent them ahead of Him: "And He told them, “The harvest is plentiful, but the workers are few. Ask the Lord of the harvest, therefore, to send out workers into His harvest.”" (Luke 10:2)

Read that again. The harvest is plentiful, workers are lacking, and Jesus' very first command in the face of this is pray. Anyone who prays for missions is asking God for the exact thing He commanded us to ask for.

And there is a fourth way, which does not show up on any list, yet preaches all the time: your testimony. The way you treat your classmate at school. The words you use when you get annoyed. What you do when the teacher leaves the room. Whether or not you join in making fun of the kid who is alone. All of this speaks before you even open your mouth — and it may be the only page of the Bible that someone near you will ever read.

🏛 Did you know — the map the church learned to look at. There is a band on the world map between 10 and 40 degrees north of the equator that covers North Africa, the Middle East, and a large part of Asia. It is the region where most of the people who still have not had access to the Gospel live, and in several of these countries being a Christian costs dearly — losing family, job, freedom. Missionaries often cannot get in. And here is the part that fills the heart: even where no one can get in, God arrives. There are many accounts of people in these regions who met Jesus without any missionary nearby and went looking for a Bible on their own. The Gospel does not depend on an entry visa.

V — Your age is not the problem

The quarterly brings a list worth keeping. Daniel and his friends spoke of God in Babylon while very young. Joseph kept his testimony in Egypt far from home. Samuel was called while still a boy, serving in the temple. Jeremiah tried to get out of it by telling God he was only a youth — and God did not accept the excuse. Josiah took the throne at eight years old and turned the entire nation back to the Lord. And Jesus, at twelve, was in the temple among the teachers, listening and asking questions (Luke 2:46-47).

None of them waited until they came of age.

That does not mean you have to do something huge right now. It means that "I am too young" is not an argument — and that God usually starts with those who are available, not with those who are ready.

That is exactly what happened with Isaiah. God asked whom He should send and who would go for them, and Isaiah's answer was short: here I am, send me (Isaiah 6:8).

Notice that Isaiah did not answer where to. He answered here I am. The address is up to God.

VI — Where your field is (and where you do not go)

Missions, in the mouth of a preteen, can turn into a dangerous idea if no one puts the rules on the table. So let's put them on the table.

Your field is where you already are. The classmates in your room. The neighbors your family knows. Your cousins. Your siblings. The people in your building, on your street, on your team. That is where your word carries the most weight, because those people see your life up close and know whether what you say is true.

And there are things that are not your role — not now, not even with the best of intentions:

  • You do not go out alone. No approaching strangers on the street, no ringing doorbells, no entering anyone's house, no going out without a responsible adult. When the church goes out into the street, you go along, with your parents knowing.
  • You do not go anywhere with someone you do not know, even if the person talks about God. If someone calls you to a place alone, asks for your contact information, or asks you to keep a secret, you do not go, you do not give it, and you do not keep it: tell your father, your mother, your teacher, or a church leader that very same day. You report it; the adult handles it.
  • You do not mistreat anyone. Talking about Jesus is not humiliating someone of another religion, it is not making fun of someone who does not believe, it is not name-calling, and it is not cutting off relatives. The atheist classmate remains a friend. Someone of another faith continues to be treated with respect. The One who convinces is the Holy Spirit; rudeness only slams doors shut.
  • You do not have a quota. No one here is going to ask you how many people you converted. That does not exist in the Bible and it will not exist in this class. Missions has no scoreboard.

❤ For your life. Maybe you are thinking: "I freeze up, I don't know what to say, I'mylib dying of embarrassment". Keep this in mind: the Holy Spirit is not looking for people who are ready; He is looking for people who are available. Jesus told the disciples to wait until they were clothed with power before going out to preach — courage was not born in them; it came from God. Ask for it. And start small: one name, one true sentence, one prayer a day.

Christ in the Lesson

This whole lesson can turn into a heavy burden if it stops at "you have an obligation." So take a step back and look at the One who started the story.

The first one sent was Jesus. Just as the Father sent Him, so He also sends us (John 20:21). Before any missionary existed, He existed — sent by the Father, leaving glory, entering a culture that was not His own, in a human body, in a small town, in a poor family (Philippians 2:6-8). The greatest cross-cultural journey in history was not from Brazil to Asia. It was from heaven to earth.

And He did not come just to talk. He came to die. The good news we proclaim is only news because the bill was paid: Christ died in our place and rose again, and that is why there is something to call upon when Romans 10:13 says that everyone who calls on the name of the Lord will be saved.

Notice also how He did missions while He was here: He went through towns and villages proclaiming the Kingdom, trained twelve men in daily life, sent seventy ahead of Him, and left the work in the hands of ordinary people — fishermen, a tax collector, a man who had denied Him. If He entrusted the mission to that team, your shyness is not that big of an obstacle.

And do not forget the last sentence of the command, where He promises that He is with us always, to the very end of the age (Matthew 28:20). He never sent anyone alone. He never has.

That is why missions is not a demand placed on you. It is overflow. It is people who were reached by grace for free and can no longer stay quiet.

And here is the most important invitation of this class: you cannot introduce someone to a Jesus whom you yourself do not know. If you have not yet surrendered your life to Him, start there, today. The rest comes after.

Practical Application

In prayer. Choose one name — a missionary your church supports or a country where Christians are persecuted — and pray for that name every day this week. One sentence is enough.

At school. Treat well those whom no one treats well. The new classmate, the one who sits alone at recess, the one the others make fun of. That preaches before any word of yours.

In your church. Ask the leadership whom your church supports on the mission field and where that person is. Then look up that place on a map. Someone who prays knowing the name and the address prays differently.

In your home. Tell your family at home what you learned today, in your own words. Missions is also a dinner-table topic.

With safety. Nothing alone, nothing with strangers, nothing out of sight of adults. Your field is the people who already know you.

Closing Prayer

Lord Jesus, thank You because You were the first one sent: You left Your glory, came to where I was, and paid what I had no way to pay. Thank You because someone, one day, had the feet Your Word speaks of and came to tell me. Forgive the times when I looked at the people on my daily path and did not see anyone. Teach me to pray for those who are far away, to respect those who do not yet believe, and to live in a way that does not bring shame to Your name at school. I do not have courage on my own, and You never asked me to have it: fill me with Your Holy Spirit and place in me the boldness I still lack. Raise up workers for Your harvest, protect those who are in dangerous places out of love for You, and if one day You want to send me, may I know how to answer like Isaiah: here I am, send me. In Jesus' name, amen.

Soli Deo Gloria — Scripture governs; everything else, on its knees.

Frequently asked questions about this lesson

Is missions the same thing as evangelism?+

No, and that is the difference between this lesson and the previous one. Evangelism is the act of proclaiming the message of salvation — you tell someone right then and there. Missions is the entire work of the organized church to take and sustain the Gospel where it has not yet reached: someone goes, someone sends, someone supports, someone prays, and those who have believed are discipled and cared for. Evangelism fits inside missions; missions is bigger. That is why Paul did not stop at asking how people will hear without someone preaching — he went on to ask how anyone can preach unless they are sent (Romans 10:14, 15). Preaching is one link. Sending is another.

Do I have to become a missionary and go to another country? If I don't go, am I disobeying?+

No. Jesus' command is for the whole church, but He does not give the same role to everyone. Romans 10:15 shows two roles named in the same verse: there is the one who preaches and there is the one who sends — and without the second, the first goes nowhere. There are those who go, those who support, and those who pray. All three are part of the work. At your age, your part is not buying a ticket: it is praying by name, learning, proclaiming Jesus where you already live, and telling God, as Isaiah did, that you are here and ready to be sent (Isaiah 6:8) — where you go is up to Him, and in His time.

I don't have money to give an offering for missions. Am I left out then?+

Not at all, and no one here is going to ask that of you. Offerings are for those who have an income, not for students — and the Bible has never measured anyone by the size of what they gave. Notice what Jesus commanded when He saw that the harvest was large and the workers were few: He did not command to raise money, He commanded to pray — asking the Lord of the harvest to send out workers into His harvest (Luke 10:2). Praying for a missionary by name, every day, is real missionary work. And it is the part that is completely within your reach.

My Bible has a note saying that Mark 16:9-20 does not appear in the oldest manuscripts. Is that passage part of the Bible?+

Good question, and it has an answer. There is an old discussion among the manuscripts: two very old manuscripts do not include these verses, but the vast majority of manuscripts do, and second-century Christian writers — such as Irenaeus, around the year 180 — already quoted this passage. Our Bible includes it as Scripture. And there is something else that settles the matter once and for all: the command to go does not depend on Mark alone. It is in Matthew 28:19, 20, in Luke 24:46-48, in John 20:21, and in Acts 1:8. Even if someone debates Mark, the command still stands in four other places.

Mark 16:18 talks about picking up serpents and drinking poison. Is that something we are supposed to do?+

No, and this needs to be very clear. That verse describes God's protection in a dangerous situation that the person did not choose — which is what happened to Paul when a viper fastened onto his hand while he was gathering brushwood after a shipwreck (Acts 28:3-6). The text does not authorize anyone to handle snakes, mess with poison, or put themselves at risk on purpose to prove their faith. Doing that is putting God to the test, and Jesus Himself answered the devil by quoting Scripture, saying that you must not put the Lord your God to the test (Matthew 4:7). Those who believe in God do not test God.

Can I approach people I don't know on the street to talk about Jesus?+

No. At your age, missions is never alone and never with strangers: no approaching people on the street, no going into someone's house, no going out without a responsible adult. That does not make your part any smaller — your field is where you already are, among people who already know you: your school, your street, your home, your church. When your church goes out to evangelize, you go along, with your parents knowing and with the leadership nearby. And if someone asks you to go somewhere alone, asks for your contact information, or asks you to keep a secret, you do not go, you do not give it, and you do not keep it: you tell someone that very same day. You report it; the adult handles it.

Preteens

Quarter 3