Love one another
For this is the message that you heard from the beginning, that we should love one another, not as Cain who was of the wicked one and murdered his brother. And why did he murder him? Because his works were evil and his brother's righteous. Do not marvel, my brethren, if the world hates you.
We know that we have passed from death to life, because we love the brethren.
He who does not love his brother abides in death. Whoever hates his brother is a murderer, and you know that no murderer has eternal life abiding in him.
By this we know love, because He laid down His life for us. And we also ought to lay down our lives for the brethren.