1 John 3:5
3:5 And you know that Jesus was revealed to take away sins, and in him there is no sin.
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 5:2
5:2 By this we know that we love the children of God: whenever we love God and obey his commandments.
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.