"He who truly believes that which prompts him to an action has looked upon the action to lust after it, he has committed it already in his heart"
About this Quote
The phrasing is doing deliberate double-duty. “Truly believes” sounds like a compliment, but in Clifford’s hands it’s an indictment: sincerity isn’t innocence if the belief is serving desire. The line “looked upon the action to lust after it” borrows the cadence of biblical admonition (the famous idea that to look with lust is to commit adultery in the heart), but Clifford secularizes it. He isn’t preaching chastity; he’s prosecuting intellectual temptation. Beliefs can be chosen the way vices are chosen: with appetite, self-justification, and a touch of theatre.
Context matters. Clifford is the author of “The Ethics of Belief,” written in an era when science, religion, and empire were locked in a contest over who got to define truth. His core claim is that believing on insufficient evidence is not a private quirk but a moral hazard: it shapes actions, spreads socially, and trains the mind to prefer comfort over rigor. The subtext is mercilessly modern: if you let desire write your convictions, you don’t just risk doing harm. You’re already practicing it.
Quote Details
| Topic | Ethics & Morality |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Clifford, William Kingdon. (2026, January 18). He who truly believes that which prompts him to an action has looked upon the action to lust after it, he has committed it already in his heart. FixQuotes. https://fixquotes.com/quotes/he-who-truly-believes-that-which-prompts-him-to-20125/
Chicago Style
Clifford, William Kingdon. "He who truly believes that which prompts him to an action has looked upon the action to lust after it, he has committed it already in his heart." FixQuotes. January 18, 2026. https://fixquotes.com/quotes/he-who-truly-believes-that-which-prompts-him-to-20125/.
MLA Style (9th ed.)
"He who truly believes that which prompts him to an action has looked upon the action to lust after it, he has committed it already in his heart." FixQuotes, 18 Jan. 2026, https://fixquotes.com/quotes/he-who-truly-believes-that-which-prompts-him-to-20125/. Accessed 21 Feb. 2026.









