 This doctrine of divine ideas and the connected theory of being had a significant result also for the notion of divine omnipotence. In the Middle Ages, one of the most important features of divine omnipotence was the capacity of annihilating, which was viewed as the necessary counterpart of the divine capacity of creating. Wyclif denies the thesis of an opposition between creation and annihilation, and explicitly denies that God can annihilate creatures. He argues that nothing is contrary to creation, since the act of creating is peculiar to God, and nothing is opposite or contrary to God. In fact, absolute non-being (the only “thing” that could be considered opposite to God) is something self-contradictory, and therefore logically impossible. Accordingly, there cannot be any action opposite to creation. The only possible kind of non-being admitted by Wyclif is corruption (corruptio), that is, the natural destruction of the actual existence in time of an object in the world (Tractatus de universalibus, chap. 13, pp. 302–3).