"The principal axiom in their theory was: Everything can be proved, and everything can be disproved; and in the process, one must profit as much from the folly of others, and from his own superiority, as he can"
About this Quote
The real bite lands in the second clause: “one must profit as much from the folly of others, and from his own superiority, as he can.” Profit is doing heavy moral work here. Mendelssohn isn’t talking about money alone; he’s naming the social economy of debate - status, access, influence, the quiet power to define what counts as “reasonable.” The subtext is cynical: once you treat discourse as an extraction industry, other people’s mistakes become resources, and your “superiority” becomes a brand to monetize.
Context matters. Mendelssohn, a key figure of the Jewish Haskalah, argued for tolerance and rational religion while navigating a Europe where “reason” could be weaponized to exclude Jews and other outsiders from full civic life. He knew the Enlightenment’s double edge: the same methods that can liberate can also be gamed by sophists, gatekeepers, and careerists. The sentence reads like an early diagnosis of the modern pundit economy: when being right matters less than looking right, proof becomes performance and cynicism starts paying dividends.
Quote Details
| Topic | Reason & Logic |
|---|---|
| Source | Help us find the source |
| Cite | Cite this Quote |
Citation Formats
APA Style (7th ed.)
Mendelssohn, Moses. (2026, January 15). The principal axiom in their theory was: Everything can be proved, and everything can be disproved; and in the process, one must profit as much from the folly of others, and from his own superiority, as he can. FixQuotes. https://fixquotes.com/quotes/the-principal-axiom-in-their-theory-was-143266/
Chicago Style
Mendelssohn, Moses. "The principal axiom in their theory was: Everything can be proved, and everything can be disproved; and in the process, one must profit as much from the folly of others, and from his own superiority, as he can." FixQuotes. January 15, 2026. https://fixquotes.com/quotes/the-principal-axiom-in-their-theory-was-143266/.
MLA Style (9th ed.)
"The principal axiom in their theory was: Everything can be proved, and everything can be disproved; and in the process, one must profit as much from the folly of others, and from his own superiority, as he can." FixQuotes, 15 Jan. 2026, https://fixquotes.com/quotes/the-principal-axiom-in-their-theory-was-143266/. Accessed 3 Feb. 2026.









