1 John 3:10-14

3:10 By this the children of God and the children of the devil are revealed: Everyone who does not practice righteousness – the one who does not love his fellow Christian – is not of God.

God Is Love, So We Must Love One Another

3:11 For this is the gospel message that you have heard from the beginning: that we should love one another, 3:12 not like Cain who was of the evil one and brutally murdered his brother. And why did he murder him? Because his deeds were evil, but his brother’s were righteous.

3:13 Therefore do not be surprised, brothers and sisters, if the world hates you. 3:14 We know that we have crossed over from death to life because we love our fellow Christians. The one who does not love remains in death.