1 John 4:13-21 NRSV
By this we know that we abide in him and he in us, because he has given us of his Spirit. And we have seen and do testify that the Father has sent his Son as the Savior of the world. God abides in those who confess that Jesus is the Son of God, and they abide in God. So we have known and believe the love that God has for us.
God is love, and those who abide in love abide in God, and God abides in them. Love has been perfected among us in this: that we may have boldness on the day of judgment, because as he is, so are we in this world. There is no fear in love, but perfect love casts out fear; for fear has to do with punishment, and whoever fears has not reached perfection in love. We love because he first loved us. Those who say, “I love God,” and hate their brothers or sisters, are liars; for those who do not love a brother or sister whom they have seen, cannot love God whom they have not seen. The commandment we have from him is this: those who love God must love their brothers and sisters also.
NRSV: New Revised Standard Version