Bruno works out at considerable length the paradoxes to which this identity of all possibility and all reality in the first principle lead. Thus, in magnitude it is both greatest and least, and as in magnitude, so in goodness, in beauty; the sun would fitly represent such a principle if it were at the same moment in all parts of the universe, if its motion were so swift that it was everywhere at once, and therefore motionless. God, however, is not only all that the sun may be, but also all that everything else may be--"potency of all potencies, reality of all realities, life of all lives, soul of all souls, being of all beings." That which elsewhere is contrary and opposite, is in Him one and the same.[274] Bruno has brought us back in a curious way to the very first principle which he proposed to exclude from contemplation: it can be understood, it is true, only by negations, for our intellect cannot measure itself with the immeasurable: we can form no image or idea of a great that might not be greater. But here follows one of the most vital steps in his philosophy:--As the absolute possibility, the first principle becomes itself _matter_, and as there is no possibility without an actuality, present or to come, the absolute possibility is also absolute reality, or matter and form coincide in the _One_.[275] We approach this conclusion first from the consideration of matter as "subject" (substrate). From the changes of one natural substance into others we inferred a universal substrate, undifferentiated, which formed at once the basis of the community of nature in things, and the ground of their difference.[276] But the spiritual and the corporeal worlds, also, as distinguished from one another, imply a common "subject" or substrate in which they are _one_ or identical. Bruno refers, as we have seen, to Plotinus[277] as having held that distinction and difference imply a common ground or unity, and that "intelligible" distinctions are not exempt from this rule. "As man _quâ_ man is different from lion _quâ_ lion, but in the common nature of animal or of corporeal substance they are one and the same, so the matter of things corporeal, as such, is different from the matter of things incorporeal, as such: but from another point of view it is the same matter which in dimensions or extension is corporeal matter, and which when without dimensions or extension is an incorporeal substance. In things eternal (spiritual) there is one matter in one simple realisation, in things variable (corporeal) matter has now one, now another; in the former, it has at one time and all together all that which it can have, and is all that it may be; in the latter, at many times, on different occasions, and in succession. The former has all species of figure and dimension, and because it has all, it has none: for that which is so many diverse things, cannot be any one of them in particular. That which is all