Catholic Wisdom

"As soon as a man begins to be tempted, especially regarding the flesh, he should fly to God and devoutly utter that prayer which the Fathers of the Desert so much esteemed: Deus in adiutorium meum intende;  Domine ad adiuvandum me festina [O God, come to my assistance; O Lord, make haste to help me], or that verse, Cor mundum crea in me Deus, that is, A clean heart create in me, O God."

--Saint Philip Neri, Maxims and Counsels.