God's love for us was revealed when God sent into the world his only Son so that we could have life through him; this is the love I mean: not our love for God, but God's love for us when he sent his Son to be the sacrifice that takes our sins away.
My dear children, since God has loved us so much, we too should love one another. No one has ever seen God; but as long as we love one another God will live in us and his love will be complete in us. We can know that we are living in him and he is living in us because he lets us share his Spirit.
Anyone who says, 'I love God', and hates his brother, is a liar, since a man who does not love the brother that he can see cannot love God, whom he has never seen. So this is the commandment that he has given us, that anyone who loves God must also love his brother. - 1 John 4:7-21