John 15:21 Meaning: Why the World Hates Jesus' Followers
But they will do all these things to you for my name’s sake, because they don’t know him who sent me.
But all these things will they do unto you for my name’s sake, because they know not him that sent me.
But all these things will they do unto you for my name’s sake, because they know not him that sent me.
but all these things will they do to you, because of my name, because they have not known Him who sent me;
But they will do all these things to you on account of my name, because they have not known him that sent me.
Meaning in one sentence
What causes persecution? John 15:21 says the world does not know the Father who sent Jesus, so they oppose those who bear His name.
Context
Jesus is speaking to his closest friends on the night before he dies. He has told them he is the vine and they are the branches. He has commanded them to love each other. Now he warns them plainly: the world will hate you. He is not trying to scare them. He is preparing them for what is coming. In this part of John, Jesus explains that persecution is not a random thing. It has a cause. The world will treat them badly because they belong to him and carry his name. And the deeper reason is that the world does not know the Father who sent him. Jesus wants them to understand this so their faith does not crumble when trouble comes.
Key Words
Three Greek words stand out in this verse. The word for name (onoma) means far more than a label. In the Bible, a name carries the whole person: character, authority, reputation. So when Jesus says they will suffer for my name's sake, he means because of everything he is and stands for. The word for know (oidasin) does not mean head knowledge. It means deep, personal knowing. The world does not have that kind of relationship with the Father. They are not willfully rejecting someone they have met; they are blind to him. The word for sent (pempsanta) points back to the Father. Jesus is the One sent on a mission. When people attack his followers, they are really attacking the One who sent him. This gives the suffering meaning: it connects believers to the very heart of God's plan.
How Christians Read This Verse
Christians across traditions have seen the same truth here. Adam Clarke, a Methodist scholar, wrote that this verse reveals the foundation of all religious persecution: those who do it know nothing about God. John Calvin, the Reformer, emphasized blind ignorance: the world does not deliberately war against God but is swept along by stupidity of mind. The Cambridge Bible for Schools and Colleges notes that suffering for Christ's name actually deepens the believer's union with him. All these readings agree that the world's hostility flows from not knowing the Father, and that this truth brings both explanation and comfort.
A common misunderstanding
A common mistake is to think that persecution means you have done something wrong, that God is displeased with you. In fact, Jesus gives the opposite reason. He says they will do these things for my name's sake, not because of your failures. The cause of the hate is not your sin but the world's ignorance of the Father. That knowledge can free you from guilt and shame when you face opposition for your faith.
Living This Out
You may never face a courtroom or a beating for your faith, but you will probably face smaller versions of this: a friend who rolls their eyes when you mention church, a coworker who mocks your beliefs, a family member who says you are too narrow. When that happens, remember Jesus told you why. It is not because you are strange or unlovable. It is because the person who rejects you does not know the Father yet. That knowledge can change how you respond. Instead of getting defensive or bitter, you might find yourself praying for them. You might hold your head up because the rejection is for his name, and that name is worth everything.
Main takeaway: Persecution for Jesus' name reveals the world's ignorance of the Father, not our failure.
For Families
For ages 5, 8
Sometimes people are unkind to you because you love Jesus. That's sad, but it's because they don't know God yet. Jesus understands how you feel.
For ages 9, 12
Jesus warned his friends that people would treat them badly because they followed him. He said it would happen because of his name, not because they did something wrong. When someone makes fun of you for being a Christian, it means they don't really know God. That's hard, but Jesus said it also means you belong to him. You can pray for that person and remember that Jesus was treated the same way.
Questions People Ask
What does "for my name's sake" mean in John 15:21?
It means because of who Jesus is and everything he stands for: his identity as the Son of God, his authority, his saving work. When believers suffer for his name, it's because they are identified with him and his mission.
Does this mean all Christians will be persecuted?
Not all in the same way or degree, but Jesus prepares his followers to expect opposition. The world's rejection stems from not knowing the Father, and believers who live faithfully may experience some form of it.
How can not knowing God lead to persecuting believers?
If people do not truly know the Father as he is revealed in Jesus, they resist the truth and reject those who represent it. Their ignorance becomes active hostility toward the very message that could save them.
Why does Jesus tell his disciples this before it happens?
He tells them to strengthen their faith. If they understand the reason for the persecution, they will not be shaken when it comes. Knowing that suffering is for his name and flows from the world's blindness helps them endure with hope.
What is the 'name' of Jesus in this context?
In the Bible, a name represents the whole person. The name of Jesus here stands for his identity, his claims, his authority, and his saving work. Bearing that name means allegiance to him.
For pastors & researchers
Greek interlinear, 8 commentaries & word study