Simon’s general psychology is standard Aristotelian doctrine, in many aspects derived from Albert the Great’s and Aquinas’s psychological teachings. However, as we shall see, Simon sometimes conflates their views, suggesting he was not entirely aware of their opposition. Thus, Simon holds that the rational soul is the substantial form of the human body because it is that on account of which humans can perform their proper operation, i.e., intellection. However, unlike the substantial form of pur