For this is the message that you heard from the beginning, that we should love one another. Not as Cain, who was of that wicked one, and slew his brother. And why slew he him? Because his own works were evil, and his brother's righteous. Marvel not, my brethren, if the world hates you. We know that we have passed from death unto life, because we love the brethren. He that loves not his brother abides in death. Whosoever hates his brother is a murderer: and you know that no murderer has eternal life abiding in him. (1 John 3:11-15)