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11For this is the message that you heard from the beginning, that we should love one another, 12not 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.
13Do not marvel, my brethren, if the world hates you. 14We know that we have passed from death to life, because we love the brethren. He who does not love his brother abides in death. 15Whoever hates his brother is a murderer, and you know that no murderer has eternal life abiding in him.
The Outworking of Love
16By this we know love, because He laid down His life for us. And we also ought to lay down our lives for the brethren. 17But whoever has this world’s goods, and sees his brother in need, and shuts up his heart from him, how does the love of God abide in him?
18My little children, let us not love in word or in tongue, but in deed and in truth.
1 John 3:11-18 (NKJV)