The Republic · Rep. 457b

and he himself is ignorant of what he is laughing at, or what he is about;—for that is, and ever will be, the best of sayings, That the useful is the noble and the hurtful is the base.

Plato · translated by Benjamin Jowett · composite transcription based on the 1888 third edition
Benjamin Jowett, revised third edition (1888), with Stephanus numbering from the 1908 edition; composite transcription, Project Gutenberg #55201
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