By this it is evident who are the children of God, and who are the children of the devil: whoever does not practice righteousness is not of God, nor is the one who does not love his brother. (1 John 3:10 ESV)
Only two kinds of children exist in the world: children of God and children of Satan. No one can belong to both families simultaneously. Either one belongs to God’s family and exhibits his righteous character [proof and evidence] or one belongs to Satan’s family and exhibits his sinful nature [proof and evidence].
As we have said, you can’t hide it from others or yourself [and God already knows].