We know that we have passed from death unto life, because we love the brethren. He that loveth not his brother abideth in death.
1 John 3:14
King James Version (public domain)
Traditionally attributed to John · 1st century AD · One of the twelve apostles of Jesus; the "beloved disciple"
Context
12Not as Cain, who was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother’s righteous.
13Marvel not, my brethren, if the world hate you.
14We know that we have passed from death unto life, because we love the brethren. He that loveth not his brother abideth in death.
15Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.
16Hereby perceive we the love of God, because he laid down his life for us: and we ought to lay down our lives for the brethren.