John Bartlett (1820–1905). Familiar Quotations, 10th ed. 1919.
9086 Diogenes Laërtius fl early 3d ent John Bartlett
| NUMBER: | 9086 |
| AUTHOR: | Diogenes Laërtius (fl. early 3d cent.) |
| QUOTATION: | When Thales was asked what was difficult, he said, “To know one’s self.” And what was easy, “To advise another.” |
| ATTRIBUTION: | Thales. ix. |