“[A] brilliant man is his own best company, unless he can find other company of the same sort.”
Man a Machine (1747)
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Julien Offray de La Mettrie 42
French physician and philosopher 1709–1751Related quotes

“A man is known by the company he keeps. A company is known by the men it keeps.”
Source: Garg, Anu, A Word A Day, Wordsmith, 2016.02.17

“A sensible man ought to find sufficient company in himself.”
Herbert N. Casson cited in: Alfred Armand Montapert (1964) Distilled Wisdom. p. 68
1950s and later

“A man is known by the company he keeps.”
Misattributed, Jackson's personal book of maxims

General Thomas Graham, p. 234
Sharpe (Novel Series), Sharpe's Fury (2006)