Listen and attend with the ear of your heart.

Where a man's heart is, there is his treasure also.

The Lord opened the understanding of my unbelieving heart, so that I should recall my sins.

But the eyes are blind. One must look with the heart...

God removes the sin of the one who makes humble confession, and thereby the devil loses the sovereignty he had gained over the human heart.

That heart alone is hard which does not shudder at itself for not feeling its hardness.