I argue that the two criteria traditionally identified as jointly sufficient for voluntary behavior according to Aristotle require qualification. Without such qualification, they admit troubling exceptions (i.e., they are not sufficient). Through minding these difficult examples, I conclude that a third condition mentioned by Aristotle – the eph' hēmin – is key to qualifying the original two criteria. What is eph' hēmin is that which is efficiently caused by appetite and teleologically caused by reason such that the agent could have, in theory, acted differently. I propose that praise and blame are justified only when 1: the behavior is voluntary and 2: the agent is susceptible (at least in principle) to the positive influences of appropria...