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.