prayer of the heart
From the inside, that is from the heart come all our sins. For Christ has said to the Apostles: “Not that which goeth into the mouth defileth a man” because it would mean to wash your hands “but that which cometh out of the mouth”. Because what comes out, comes from the heart. From the heart come adulteries, crimes, pride, insults. As in hell, they come out of our heart, and when they do, we are tempted from the inside.