You, dear children, are from God and have overcome them [those who deny that Jesus is from God and who have the spirit of the world], because the one who is in you is greater than the one who is in the world.
And he has given us this command: Whoever loves God must also love his brother.
If anyone says, "I love God," yet hates his brother, he is a liar. For anyone who does not love his brother, whom he has seen, cannot love God, whom he has not seen.
We love because he first loved us.
There is no fear in love. But perfect love drives out fear, because fear has to do with punishment. The one who fears is not made perfect in love.
In this way, love is made complete among us so that we will have confidence on the day of judgment, because in this world we are like him.
And so we know and rely on the love God has for us. God is love. Whoever lives in love lives in God, and God in him.
If anyone acknowledges that Jesus is the Son of God, God lives in him and he in God.
We know that we live in him and he in us, because he has given us of his Spirit.
No one has ever seen God; but if we love one another, God lives in us and his love is made complete in us.