1 John 3:16

3:16 We have come to know love by this: that Jesus laid down his life for us; thus we ought to lay down our lives for our fellow Christians.

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 3:24

3:24 And the person who keeps his commandments resides in God, and God in him. Now by this we know that God resides in us: by the Spirit he has given us.