 Like all scholastics since the early thirteenth century, James subscribes to the distinction between God’s ordained power, according to which “God can only do what he preordained he would do according to wisdom and will” (Quodl. I, q. 2, p. 17, 35–37) and his absolute power, according to which he can do whatever is “doable,” i.e., whatever does not imply a contradiction. Problems concerning what God can or cannot do arise only in the latter case. James considers several questions: can God add an infinite number of created species to the species already in existence (Quodl. I, q. 2)? Can he make matter exist without form (Quodl. IV, q. 1)? Can he make an accident subsist without a substrate (Quodl. II, q. 1)? Can he create the seminal reason of a rational soul in matter (Quodl. III, q. 10)? In response to the first question, James explains, following Giles of Rome but against the opinion of Godfrey of Fontaines and Henry of Ghent, that God can by his absolute power add an infinite number of created species ad superius, in the ascending order of perfection, if not in actuality, then at least in potency. God cannot, however, add even one additional species of reality ad inferius, between prime matter and pure nothingness, not because this exceeds his power but because prime matter is contiguous to nothingness and leaves, so to speak, no room for God to exercise his power (Côté 2009). James is more hesitant about the second question. He is sympathetic both to the arguments of those who deny that God can make matter subsist independently of form and to the arguments of those who claim he can. Both positions can reasonably be held, because each argues from a different (and valid) perspective. Proponents of the first position argue from the point of view of reason: because they rightly believe that God cannot make what implies a contradiction, and because they believe (rightly or wrongly) that making matter exist without form does involve a contradiction, they conclude that God cannot make matter exist without form. Proponents of the second group argue from the perspective of God’s omnipotence which transcends human reason: because they rightly assume that God’s power exceeds human comprehension, they conclude (rightly or wrongly) that making matter exist without form is among those things exceeding human comprehension that God can make come to pass.