John Bartlett (1820–1905). Familiar Quotations, 10th ed. 1919.
9145 Diogenes Laërtius fl early 3d ent John Bartlett
| NUMBER: | 9145 |
| AUTHOR: | Diogenes Laërtius (fl. early 3d cent.) |
| QUOTATION: | When asked what learning was the most necessary, he said, “Not to unlearn what you have learned.” |
| ATTRIBUTION: | Antisthenes. iv. |