Ignorance and trouble

“A man may be ignorant . . . of who he is, what he is doing, what or whom he is acting on, and sometimes also what (e.g. what instrument) he is doing it with, and to what end (e.g. he may think his act will conduce to some one’s safety), and how he is doing it (e.g. whether gently or violently).”

Aristotle, Nicomachean Ethics Book III