| John Bartlett (18201905). Familiar Quotations, 10th ed. 1919. |
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| NUMBER: | 9137 |
| AUTHOR: | Diogenes Laërtius (fl. early 3d cent.) |
| QUOTATION: | The question was once put to him, how we ought to behave to our friends; and the answer he gave was, As we should wish our friends to behave to us. |
| ATTRIBUTION: | Aristotle. xi. |
| BIOGRAPHY: | Columbia Encyclopedia. |
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