John Bartlett (1820–1905). Familiar Quotations, 10th ed. 1919.
9515 Fran&edilois
| NUMBER: | 9515 |
| AUTHOR: | François, duc de La Rochefoucauld (1613–1680) |
| QUOTATION: | Interest speaks all sorts of tongues, and plays all sorts of parts, even that of disinterestedness. |
| ATTRIBUTION: | Maxim 39. |