wherefore among individual things nothing is more useful to man, than a man who lives in obedience to reason.
 Baruch Spinoza, Ethics (1677). copy citation

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Author Baruch Spinoza
Source Ethics
Topic obedience reason
Date 1677
Language English
Reference
Note Translated by R. H. M. Elwes
Weblink http://www.gutenberg.org/files/3800/3800-h/3800-h.htm

Context

“But man acts absolutely according to the laws of his nature, when he lives in obedience to reason (III. Def. ii.) , and to this extent only is always necessarily in harmony with the nature of another man (by the last Prop.) ; wherefore among individual things nothing is more useful to man, than a man who lives in obedience to reason. Q.E.D. Corollary II.—As every man seeks most that which is useful to him, so are men most useful one to another. For the more a man seeks what is useful to him and endeavours to preserve himself, the more is he endowed with virtue” source