"You should examine yourself daily. If you find faults, you should correct them. When you find none, you should try even harder."

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That no one, no one at all, should try to search into himself! But the wallet of the person in front is carefully kept in view. [Lat., Ut nemo in sese tentat descendere, nemo! Sed praecedenti spectatur mantica tergo.]

— Aulus Persius Flaccus