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 5:19

5:19 We know that we are from God, and the whole world lies in the power of the evil one.