KJV:
Beloved, let us love one another: for love is of God; and every one that loveth is born of God, and knoweth God.
NASB:
Beloved, let us love one another, for love is from God; and everyone who loves is born of God and knows God.
KJV:
He that loveth not knoweth not God; for God is love.
NASB:
The one who does not love does not know God, for God is love.
KJV:
In this was manifested the love of God toward us, because that God sent his only begotten Son into the world, that we might live through him.
NASB:
By this the love of God was manifested in us, that God has sent His only begotten Son into the world so that we might live through Him.
KJV:
Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins.
NASB:
In this is love, not that we loved God, but that He loved us and sent His Son to be the propitiation for our sins.