1 John 3:19 in the King James Version
And hereby we know that we are of the truth, and shall assure our hearts before him.
Context
18 My little children, let’s not love in word only, or with the tongue only, but in deed and truth.
19 And by this we know that we are of the truth and persuade our hearts before him,
20 because if our heart condemns us, God is greater than our heart, and knows all things.