For over-confidence may be generated in some by anger and folly, but to despise what men admire is not possible without a true and steady elevation of mind.
 Plutarch, Moralia (c. 100 AD). copy citation

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Author Plutarch
Source Moralia
Topic anger elevation
Date c. 100 AD
Language English
Reference
Note Translated by Arthur Richard Shilleto
Weblink http://www.gutenberg.org/files/23639/23639-h/23639-h.htm

Context

“He that is not moved or affected by all this is already plainly one upon whom philosophy has got a right hold; for it is impossible that we should cease to be envious of what most people admire, unless the admiration of virtue was strongly implanted in us. For over-confidence may be generated in some by anger and folly, but to despise what men admire is not possible without a true and steady elevation of mind. And so people in such a condition of mind, comparing it with that of others, pride themselves on it, and say with Solon, "We would not change virtue for wealth, for while virtue abides, wealth changes hands, and now one man, now another, has it."263 And Diogenes compared his shifting about from Corinth to Athens, and again from Thebes to Corinth, to the different residences of the King of Persia, as his spring residence at Susa, his winter residence at Babylon, and his summer residence in Media.” source