Chapter 19 — Part II: The Sacraments — Penance
Section 64. Sorrow For Sin Should Be Intense — Besides, our contrition should be not only the greatest, but also the most intense, and so perfect that it excludes all apathy and indifference; for it is written in Deuteronomy: When thou shalt seek the Lord thy God, thou shalt find him: yet so if thou seek him with all thy heart, and all the affliction of thy soul, and in Jeremias.: Thou shalt seek me and shalt find me, when thou shalt seek me unto all thy heart; and I will be found by thee, saith the Lord.