"It is sometimes objected that this aspect of omnipotence involves the contradiction that God cannot do all that He can do; but the argument is sophistical; it is no contradiction to assert that God can realize whatever is possible, but that no number of actualized possibilities exhausts His power. Omnipotence is perfect power, free from all mere potentiality. Hence, although God does not bring into external being all that He is able to accomplish, His power must not be understood as passing through successive stages before its effect is accomplished. The activity of God is simple and eternal, without evolution or change. The transition from possibility to actuality or from act to potentiality, occurs only in creatures. When it is said that God can or could do a thing, the terms are not to be understood in the sense in which they are applied to created causes, but as conveying the idea of a Being possessed of infinite unchangeable power, the range of Whose activity is limited only by His sovereign Will".