KJV: And he that keepeth his commandments dwelleth in him, and he in him. And hereby we know that he abideth in us, by the Spirit which he hath given us.
NASB: The one who keeps His commandments abides in Him, and He in him. We know by this that He abides in us, by the Spirit whom He has given us.
KJV: And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is thatspirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
NASB: and every spirit that does not confess Jesus is not from God; this is the spirit of the antichrist, of which you have heard that it is coming, and now it is already in the world.
KJV: We are of God: he that knoweth God heareth us; he that is not of God heareth not us. Hereby know we the spirit of truth, and the spirit of error.
NASB: We are from God; he who knows God listens to us; he who is not from God does not listen to us. By this we know the spirit of truth and the spirit of error.
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.