The Republic · Rep. 409c–409d

Yes, I replied, and he will be a good man (which is my answer to your question); for he is good who has a good soul. But the cunning and suspicious nature of which we spoke,—he who has committed many crimes, and fancies himself to be a master in wickedness, when he is amongst his fellows, is wonderful in the precautions which he takes, because he judges of them by himself: but when he gets into the company of men of virtue, who have the experience of age, he appears to be a fool again, owing to his unseasonable suspicions; he cannot recognise an honest man, because he has no pattern of honesty in himself; at the same time, as the bad are more numerous than the good, and he meets with them oftener, he thinks himself, and is by others thought to be, rather wise than foolish.

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
Passage preview. Read in context for the complete text, notes and references.