Passage
They are of the world. Therefore of the world they speak: and the world heareth them.
They are of the world. Therefore of the world they speak: and the world heareth them.
1 John 4:3 And every spirit that dissolveth Jesus is not of God. And this is Antichrist, of whom you have heard that he cometh: and he is now already in the world.
1 John 4:4 You are of God, little children, and have overcome him. Because greater is he that is in you, than he that is in the world.
1 John 4:5 They are of the world. Therefore of the world they speak: and the world heareth them.
1 John 4:6 We are of God. He that knoweth God heareth us. He that is not of God heareth us not. By this we know the spirit of truth and the spirit of error.
1 John 4:7 Dearly beloved, let us love one another: for charity is of God. And every one that loveth is born of God and knoweth God.
The verse centers on "world", "therefore", "speak", and "heareth". It is saying that the verse draws attention to "world" and "therefore", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 4's "You are of God little children and..." into verse 6's "We are of God He that knoweth...", so "world" and "therefore" belong inside that flow. In 1 John context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "world" and "therefore" with trust shaped by these words, not by a vague optimism outside the passage.