Criticism is twofold: that which teaches us what we are to choose, and that which teaches us what to avoid.
διττοῦ δὲ ὄντος τοῦ τῆς συμβουλῆς ἔργου, τὰ μὲν γὰρ αἱρεῖσθαι, τὰ δὲ φεύγειν διδάσκει.
Original text (Ancient Greek)
More quotes by Lucian
When once a dog has taken to gnawing your shoes, you can never break him of the habit.
Ignorance is a dreadful thing and has caused no end of damage to the human race.
The effort only shifted me from the frying-pan into the fire.
Attribution
Quote text and notes from Wikiquote: Lucian (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.