Thomas Aquinas, on Job 31:9

“If my heart hath been deceived upon a woman, and if I have laid wait at my friend’s door:”

“In adultery, however, a man plots deceitfully against the wife of his neighbor, and this plot is preceded by a certain deception of heart, as long as reason is darkened by concupiscence, and so he says, "If my heart has been deceived by a woman," referring to the desire of the wife of another. From the fact that the heart is conquered by concupiscence for a woman, one tries to possess the woman desired by any deceitful means whatever, and so he says, "and if I have lain in wait at my neighbor's door," to take advantage of his wife.”

Imported from an open dataset — not yet checked against the printed edition.