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The Importance of Evangelism

Lesson 12 · Quarter 3 2026 · 09/06/2026 · 15 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

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

The lesson shows that evangelizing is not someone else's job: it is Jesus' order for every Christian, and the command to go in Mark 16:15 is a commandment, not a suggestion. The study explains what true evangelism is—proclaiming the message of salvation, with words and with your life—shows why Paul was not ashamed of the Gospel, and teaches that no one does this in their own strength: Jesus promised being clothed with power from the Holy Spirit, and that promise still stands. And it makes very clear where an 11- or 12-year-old student evangelizes: among the friends they already have, at school and at home, always with a responsible adult present—never alone on the street, never mistreating those who think differently, and never with a conversion quota.

Answer honestly, without fooling yourself: do your friends at school know that you are a Christian?

And it does not count to say, "They know I go to church." That is easy — it comes up in conversation, someone asks what you did on Sunday, and that is it. The question is a different one: do they know by the way you talk, by the way you treat people, by what you do when no one is watching?

If your answer was "I don't think so," this lesson is for you. And if it was "Yes, they do," this lesson is for you too — because there is another level.

Today's subject is the one most Christians think is someone else's job: evangelism. The pastor's. The missionary's. The adult who is brave. The aunt who knows how to speak well. Anyone's, except mine.

Let's see why that math does not add up.

I — What evangelism is (and what it is not)

Ask ten people what evangelism is and nine will say the same thing: it is going out on the street with tracts talking about Jesus.

That is not wrong. But it is too small.

Evangelism is proclaiming the message of salvation. The way changes; the message does not. So:

  • Telling a friend that Jesus changed your life? That is evangelism.
  • Inviting someone to church? That is evangelism.
  • Not cheating on a test, and the whole class seeing it? Hold on to that one — we will come back to it at the end of the lesson.

The word "gospel" means good news. And you do not deliver good news with a scowl, or by shouting, or to win an argument. You deliver it like someone who has something good and wants to share it.

αβ In the original — Greek. In Acts 1:8, Jesus says that the disciples would be His witnesses. The Greek word is mártyres — from which our word "martyr" comes. But its basic meaning is simple: a witness is someone who tells what they saw. Not a lawyer, not a judge. A witness does not need to win the case; they need to tell the truth about what happened to them. Keep this in mind: you were not called to convince anyone by force. You were called to tell.

II — "Go" is a commandment, not a suggestion

The Golden Text of this lesson is Jesus' final command, and it is short:

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

Notice just one little word: go.

It is not written "go if you can." It is not written "go if you have time left over." And, above all, it is not written "go if you have the gift." It is a commandment — from the same family as not stealing and honoring your father and your mother. No one wakes up and says: today I don't feel like honoring my parents. With "go," it is the same.

In other words: evangelizing is not an optional task. It is the duty of every Christian who has been reached by the grace of God.

And there is a detail that makes this even more serious. God could have given this mission to the angels. Perfect beings, who stand before Him all the time. In Acts 10, an impressive scene takes place: a man named Cornelius receives a visit from an angel. The angel is right there in the room. And what does he say? Send for a man named Peter, over in Joppa (Acts 10:5, 6).

The angel could have preached right there. He did not. God sent for a human being.

This mission is ours. Yours and mine. It is a huge trust — and that is why we cannot treat it as if it were nothing.

III — "For I am not ashamed"

After Jesus, the greatest example of commitment to evangelism has a name: Paul.

And look at this man's story. He started out persecuting Christians — arresting people, approving of their death. He ended up as the greatest missionary in the history of the church. He spent so much time preaching in Ephesus that the Bible says practically everyone who lived in Asia heard the word of the Lord (Acts 19:10). And he wrote a sentence worth memorizing:

"I am not ashamed of the gospel, because it is the power of God for salvation to everyone who believes, first to the Jew, then to the Greek." (Romans 1:16)

I am not ashamed. He was arrested because of it. He was whipped, shipwrecked, went hungry, a viper bit his hand — he shook his hand off and kept on preaching.

And he even wrote something stronger: "Yet when I preach the gospel, I have no reason to boast, because I am obligated to preach. Woe to me if I do not preach the gospel!" (1 Corinthians 9:16) For Paul, preaching the Gospel was not a nice extra on his résumé. It was his life's commitment.

Now bring this to today. When people find out that you are a Christian, what happens? Usually a laugh. A "you're a believer?". A look from the group when you say you are not going to a certain place. A laughing emoji in the class group chat.

Paul faced beatings. Sometimes we cannot even face an emoji.

This is not meant to make you feel bad. It is so you can compare and realize something good: the price we pay today is small — and we can afford to pay it.

IV — No one does this in their own strength

Now comes the part that changes everything, and it is the part that is almost always left out.

If evangelism were a matter of natural courage, half the church would be out. But notice what Jesus did before sending the disciples into the world: He told them to wait.

"And behold, I am sending the promise of My Father upon you. But remain in the city until you have been clothed with power from on high." (Luke 24:49)

And in Acts 1:8 He says it again, in other words: they would receive the power of the Holy Spirit and would be witnesses in Jerusalem, in Judea, in Samaria, and to the ends of the earth. First the clothing with power; then the mission.

And the disciples did not just stand around with their arms crossed waiting for it to fall from the sky. Acts 1:14 says that they continued with one accord in prayer and supplication. Waiting on their knees.

Then came the day of Pentecost: "And they were all filled with the Holy Spirit and began to speak in other tongues as the Spirit enabled them." (Acts 2:4)

The same men who had been afraid and locked inside went out preaching on the street to a crowd. It was not courage born inside them. It was power that came from God.

And notice how Jesus Himself connects this to the "go" of our text: right after commanding them to preach the Gospel to all creation, He says: "And these signs will accompany those who believe: In My name they will drive out demons; they will speak in new tongues;" (Mark 16:17) The baptism in the Holy Spirit, with the evidence of speaking in other tongues, is not a museum piece or a privilege only for people in ancient times. Peter made this crystal clear on the day of Pentecost: repent, be baptized, and you will receive the gift of the Holy Spirit, because the promise is for you, for your children, and for all who are far off (Acts 2:38, 39).

For your children. That includes you, at 11 or 12 years old.

Two things not to confuse, because they go together:

  1. The empowerment is from God. You do not need to manufacture courage. You ask, seek, pray — and He clothes you with power.
  2. The obedience is yours. God gives the strength; the one who opens their mouth is you. Grace empowers, but it does not push anyone by force: you can receive it and you can set it aside. That is why Mark 16:20 says that the disciples went out and preached everywhere — and only then did the Lord work with them, confirming the word. They went out. God confirmed.

V — Use words, but preach with your life

Remember "not cheating on a test"? Now is the time.

True preaching comes accompanied by actions, otherwise it turns into mere talk. And the Bible is tough on empty talk. James describes an embarrassing scene: a brother or sister is hungry, and someone comes along and says, go in peace, keep warm and eat your fill — and does not give them anything to eat. What good did that do? None. That is why James concludes that faith without works is dead (James 2:15-17).

And the lesson asks an uncomfortable question: how is the church going to preach to reach those on the outside, if on the inside there is a brother going hungry?

The early church was the opposite of that. "They devoted themselves to the apostles’ teaching and to the fellowship, to the breaking of bread and to prayer." (Acts 2:42) — and the text goes on to say that they shared with all, according to each one's need (Acts 2:45). No one lacked anything. No one.

James even defines pure religion in a way many people do not expect: caring for orphans and widows in their distress (James 1:27). It is not the size of the church building. It is not the volume of the worship.

And John the Baptist translated this into a child's language: whoever has two tunics shares with the one who has none (Luke 3:11). This is not about clothes. It is about what is left over in your life and lacking in someone else's life — a snack, a spot in the circle, school supplies, attention.

So yes: not cheating on a test is evangelism. Returning extra change is evangelism. Not joining in when people make fun of the left-out classmate is evangelism. People need to see that Christians are different — not better, different — and that is what makes someone ask, why are you like that?. Then you tell them.

🏛 Fun fact — who spread Christianity. After Stephen's death, a severe persecution broke out and the Christians in Jerusalem had to scatter. Acts 8:4 tells us that those who were scattered went everywhere preaching the word — and they were not the apostles, who stayed in the city. They were ordinary people: homemakers, merchants, slaves, people with no church title at all. Christianity did not spread across the world because of religious professionals. It spread because ordinary people could not keep quiet about what God had done for them.

VI — Where you evangelize — and where you do not go

Here the lesson needs to be very practical, because go into all the world in the mouth of a preteen can turn into a dangerous idea.

Your mission field is what you already have. Your friends at school. Your cousins. The neighbors your family knows. Your own parents and siblings. It is right there, among the people who already trust you, that your words carry the most weight — because they see your life up close and know whether what you say is true.

And there are things that are not your job, neither now nor with good intentions:

  • You do not go out alone. No evangelizing on the street without a responsible adult, no approaching strangers, no ringing anyone's doorbell. When your church goes out to evangelize, you go along — with your parents knowing and with the leadership nearby.
  • You do not go anywhere with someone you do not know, even if the person talks about God, even if they seem nice. 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: tell your father, your mother, your teacher, or a leader that very same day. You speak up; the adult handles it.
  • You do not mistreat anyone. Evangelizing is not humiliating someone of another religion, it is not name-calling, it is not making fun of what someone else believes, and it is not cutting off relatives. Your atheist friend is still your friend. Your classmate of another faith is still treated with respect. The one who convinces is the Holy Spirit; rudeness only slams the door 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.

❤ For your life. Maybe you are thinking: "I am the shyest person in the room, this is not for me." Notice that most of the evangelism in the world was never done on a stage. It was done in a one-on-one conversation, during recess, on the way home, at the kitchen table. You do not need a microphone. You need one person and one true sentence.

Christ in the Lesson

If the lesson stops at "you have an obligation," it becomes a burden — and a burden does not sustain anyone for very long.

Take a step back. Why is there good news to proclaim? Because the bad news was true: we were lost, separated from God by sin, with no way to fix it on our own. And Christ did not stay watching from afar. He came, lived among us, died on the cross in our place, and rose again. That is the Gospel — it is not advice for a good life; it is news of a rescue.

Notice also who the first evangelist was: Jesus. He went through the towns proclaiming that the Kingdom of God had arrived. And notice whom He called to carry on: a fisherman who denied Him, a former persecutor of Christians, a group of frightened people. If God used Peter after his denial and Paul after his persecution, your shyness is not much of an obstacle.

That is why evangelism is not a performance goal and not a trophy for a hard-working Christian. It is overflow. It is people who were saved by grace and can no longer keep quiet. No one delivers good news out of obligation; they deliver it because the news is too good to keep to themselves.

And here is the most important invitation of this lesson: you cannot introduce someone to a Jesus you do not know yourself. If you have not yet surrendered your life to Him, start there, today. Then we can talk about whom to tell.

Practical Application

At school. Choose one person — a friend you already have — and tell them one true thing that God has done in you. It does not need to be a sermon. One honest sentence is worth more than a memorized speech.

At home. Talk about Jesus where it is hardest: with those who see you every day. A sibling, a cousin, a grandparent. And invite them to go to church with you, with your parents knowing.

In your conduct. This week, do what is right at the exact point where almost everyone else does what is wrong — not cheating, not joining in the mocking, returning what is not yours. People read your life before they hear your words.

In prayer. Make a short list of three names, and pray for them every day. And ask God for the courage and the clothing with power of the Holy Spirit that you do not yet feel you have.

Safely. Nothing alone, nothing with strangers, nothing out of sight of adults. Evangelism at your age happens among people you already know — or together with your church and your parents.

Closing Prayer

Lord Jesus, thank You because one day someone had the courage to tell me about You. Forgive the times when I was ashamed to be Yours, when I stayed silent for fear of a laugh, when I lived in a way that hid from everyone whom I belong to. I do not have the strength for this on my own, and You never asked me to have it: fill me with Your Holy Spirit, clothe me with power from on high, and place in me the boldness that I do not have. Teach me to speak of You with love and without rudeness, to respect those who do not yet believe, and to preach with my life as well, and not only with my mouth. Give me a name and a face — one person, this week. And if I still lack surrender, I surrender now: forgive my sins and make me Your witness. In Jesus' name, amen.

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

Frequently asked questions about this lesson

My best friend is not a Christian, or is from another religion. Do I have to stop hanging out with him?+

No. Nowhere did Jesus tell you to cut off friendship with those who do not believe—He Himself was accused of hanging out with the wrong people. Evangelizing is sharing good news, and good news is not delivered rudely. Your friend remains your friend and continues to be treated with respect, and you do not humiliate him, call him names, make fun of his religion, or campaign against him in class. Speak the truth with kindness and live in a way that makes people want to ask questions. The one who convicts is the Holy Spirit, not an argument.

What if I talk about Jesus and people laugh in my face?+

It will happen at some point, and you will survive. Paul was imprisoned, whipped, and shipwrecked, and he wrote this: "I am not ashamed of the gospel, because it is the power of God for salvation to everyone who believes, first to the Jew, then to the Greek." (Romans 1:16). Many times, we cannot even handle a laughing emoji. This is not meant to make you feel guilty—it is so you can see that the price we pay today is small and we can afford to pay it. And if the teasing turns into real bullying or persecution, then it is not something for you to handle alone: tell your parents and your teacher.

What if I speak up and the person does not accept Jesus? Is it my fault?+

No. Your part is to share; the decision belongs to the person and the result belongs to God. Paul wrote: "I planted the seed and Apollos watered it, but God made it grow." (1 Corinthians 3:6). Evangelism is not a quota and it is not a competition: no one is a better Christian because they converted more people. You were called to be a witness, and a witness does not need to win the case—they just need to tell the truth about what they saw.

I am shy and I freeze up. Can I get out of this?+

Feeling shy is normal and does not excuse you from it—but notice that Jesus never sent anyone to do this in their own strength. Before ascending to heaven, He told the disciples to wait until they were clothed with power from on high (Luke 24:49). Those very same men who were afraid went out speaking boldly after Pentecost. The promise of baptism in the Holy Spirit has not ended (Acts 2:38, 39). Start small: one person, one true sentence, and ask God for the courage you do not yet have.

Can I go out alone on the street handing out tracts or ringing doorbells?+

No. At your age, evangelism is never done alone and never with strangers: do not approach people on the street, go to someone's house, or go out without a responsible adult. Your field is what you already have—your school friends, your cousins, the neighbors your family knows, your own home. And when the church goes out to evangelize, you go along with your parents and the leadership. That is not lesser evangelism: most people who become Christians are reached by someone they already knew.

Mark 16:16 says that whoever does not believe will be condemned. So should I say that to my classmate?+

The verse is true and the Bible does not hide it. But notice that it is a warning from God, not a weapon in your hand. The one who judges is God, who knows every heart; you are no one's judge and you do not know what God is still going to do in that person's life. Using this verse to scare, threaten, or silence a classmate is misusing the Bible. The right way is to tell the whole good news: there is condemnation, and there is Someone who gave Himself to deliver us from it.

Preteens

Quarter 3