1 John 3:19-21

19 By this we shall know that we are of the truth, and reassure our hearts before him
20 whenever our hearts condemn us; for God is greater than our hearts, and he knows everything.
21 Beloved, if our hearts do not condemn us, we have confidence before God;

1 John 3:19-21 In-Context

17 But if any one has the world's goods and sees his brother in need, yet closes his heart against him, how does God's love abide in him?
18 Little children, let us not love in word or speech but in deed and in truth.
19 By this we shall know that we are of the truth, and reassure our hearts before him
20 whenever our hearts condemn us; for God is greater than our hearts, and he knows everything.
21 Beloved, if our hearts do not condemn us, we have confidence before God;
22 and we receive from him whatever we ask, because we keep his commandments and do what pleases him.
23 And this is his commandment, that we should believe in the name of his Son Jesus Christ and love one another, just as he has commanded us.