1 John 2:29

2:29 If you know that he is righteous, you also know that everyone who practices righteousness has been fathered by him.

1 John 3:19

3:19 And by this we will know that we are of the truth and will convince our conscience in his presence,

1 John 4:8

4:8 The person who does not love does not know God, because God is love.