But whoever keeps his word, God's love has most certainly been perfected in him. This is how we know that we are in him:

But he who hates his brother is in the darkness, and walks in the darkness, and doesn't know where he is going, because the darkness has blinded his eyes.

Whoever denies the Son, the same doesn't have the Father. He who confesses the Son has the Father also.

Behold, how great a love the Father has bestowed on us, that we should be called children of God! For this cause the world doesn't know us, because it didn't know him.

Everyone who has this hope set on him purifies himself, even as he is pure.

Whoever remains in him doesn't sin. Whoever sins hasn't seen him, neither knows him.

He who sins is of the devil, for the devil has been sinning from the beginning. To this end the Son of God was revealed, that he might destroy the works of the devil.

Whoever hates his brother is a murderer, and you know that no murderer has eternal life remaining in him.

But whoever has the world's goods, and sees his brother in need, and closes his heart of compassion against him, how does the love of God remain in him?

By this you know the Spirit of God: every spirit who confesses that Jesus Christ has come in the flesh is of God,

and every spirit who doesn't confess that Jesus Christ has come in the flesh is not of God, and this is the spirit of the Antichrist, of whom you have heard that it comes. Now it is in the world already.

By this God's love was revealed in us, that God has sent his one and only Son into the world that we might live through him.

No one has seen God at any time. If we love one another, God remains in us, and his love has been perfected in us.

By this we know that we remain in him and he in us, because he has given us of his Spirit.

We have seen and testify that the Father has sent the Son as the Savior of the world.

We know and have believed the love which God has for us. God is love, and he who remains in love remains in God, and God remains in him.

In this love has been made perfect among us, that we may have boldness in the day of judgment, because as he is, even so are we in this world.

There is no fear in love; but perfect love casts out fear, because fear has punishment. He who fears is not made perfect in love.

If a man says, "I love God," and hates his brother, he is a liar; for he who doesn't love his brother whom he has seen, how can he love God whom he has not seen?

For whatever is born of God overcomes the world. This is the victory that has overcome the world: your faith.

If we receive the witness of men, the witness of God is greater; for this is God's testimony which he has testified concerning his Son.

He who believes in the Son of God has the testimony in himself. He who doesn't believe God has made him a liar, because he has not believed in the testimony that God has given concerning his Son.

He who has the Son has the life. He who doesn't have God's Son doesn't have the life.

We know that the Son of God has come, and has given us an understanding, that we know him who is true, and we are in him who is true, in his Son Jesus Christ. This is the true God, and eternal life.