This gives a great field for the flatterer in friendship, who finds a wonderful base of operations in our self-love, which makes each person his own first and greatest flatterer.
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Original Citation
Plutarch. "Πῶς ἄν τις διακρίνοιε τὸν κόλακα τοῦ φίλου [How to Tell a Flatterer from a Friend]." Ἠθικά Ethika [Moralia]. c. 100 AD.
Current Citation
Plutarch. "How to Distinguish a Flatterer from a Friend." Essays. Penguin Classics, 1993.