1 John 3:1, 10

The Father has loved us so much that we are called children of God. And we really are his children. The reason the people in the world do not know us is that they have not known him.

So we can see who God’s children are and who the devil’s children are: Those who do not do what is right are not God’s children, and those who do not love their brothers and sisters are not God’s children.