12 Do you wish for proof of my assertions? Take examples. Sampson was braver than a lion and tougher than a rock; alone and unprotected he pursued a thousand armed men; and yet, in Delilah's embrace, his resolution melted away. David was a man after God's own heart, and his lips had often sung of the Holy One, the future Christ; and yet as he walked upon his housetop he was fascinated by Bathsheba's nudity, and added murder to adultery. Notice here how, even in his own house, a man cannot use his eyes without danger. Then repenting, he says to the Lord: “Against you, you only, have I sinned and done this evil in Your sight.” Being a king he feared no one else. So, too, with Solomon. Wisdom used him to sing her praise, and he treated of all plants “from the cedar tree that is in Lebanon even unto the hyssop that springs out of the wall;” and yet he went back from God because he was a lover of women. And, as if to show that near relationship is no safeguard, Amnon burned with illicit passion for his sister Tamar.
Source: Letters (New Advent)