11 For this is the original message we heard: We should love each other. 12 We must not be like Cain, who joined the Evil One and then killed his brother. And why did he kill him? Because he was deep in the practice of evil, while the acts of his brother were righteous. 13 So don't be surprised, friends, when the world hates you. This has been going on a long time.
14 The way we know we've been transferred from death to life is that we love our brothers and sisters. Anyone who doesn't love is as good as dead. 15 Anyone who hates a brother or sister is a murderer, and you know very well that eternal life and murder don't go together.
Matthew Henry's Commentary on 1 John 3:11-15
Commentary on 1 John 3:11-15
(Read 1 John 3:11-15)
We should love the Lord Jesus, value his love, and therefore love all our brethren in Christ. This love is the special fruit of our faith, and a certain sign of our being born again. But none who rightly know the heart of man, can wonder at the contempt and enmity of ungodly people against the children of God. We know that we are passed from death to life: we may know it by the evidences of our faith in Christ, of which love to our brethren is one. It is not zeal for a party in the common religion, or affection for those who are of the same name and sentiments with ourselves. The life of grace in the heart of a regenerate person, is the beginning and first principle of a life of glory, whereof they must be destitute who hate their brother in their hearts.