KJV:
Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.
NASB:
Whoever confesses that Jesus is the Son of God, God abides in him, and he in God.
KJV:
And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him.
NASB:
We have come to know and have believed the love which God has for us. God is love, and the one who abides in love abides in God, and God abides in him.
KJV:
If a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, how can he love God whom he hath not seen?
NASB:
If someone says, "I love God," and hates his brother, he is a liar; for the one who does not love his brother whom he has seen, cannot love God whom he has not seen.