 For Ockham, this is required if I am going to be morally responsible for my actions. If I could not help but will to act to achieve my ultimate good, then it would not be morally praiseworthy of me to do so; moral “sins of omission” would be impossible (although of course I could be mistaken in the means I adopt). By the same token, moral “sins of commission” would be impossible if I could not knowingly act against my ultimate good. But for Ockham these conclusions are not just required by theory; they are confirmed by experience.