Nor is it merely as objects or phenomena that Milton sustains throughout his whole poem a consistent conception of the Angels. He is likewise consistent in his description of them as physical agents. Lofty stature and appearance carry with them a promise of so much physical power; and hence, in Milton's case, the necessity of finding words and figures capable of expressing modes and powers of mechanical action, on the part of the Angels, as superhuman as the stature and appearance he has given to them. This complicated his difficulties very much. It is quite conceivable that a man should be able to describe the mere appearance of a gigantic being standing up, as it were, with his back to a wall, and yet utterly break down, and not be able to find words, when he tried to describe this gigantic being stepping forth into colossal activity and doing some characteristic thing. Milton has overcome the difficulty. His conception of the Angels as physical agents does not fall beneath his conception of them as mere objects. In his description, for instance, in the sixth book, of the Angels tearing up mountains by the roots and flinging them upon each other, we have strength suggested corresponding to the reputed stature of the beings. In extension of the same remark, we may observe how skilfully Milton has aggrandized and eked out his conception of the superhuman beings he is describing by endowing them with the power of infinitely swift motion through space. On this point we offer our readers an observation which they may verify for themselves:--Milton, we are persuaded, had it vaguely in his mind, throughout _Paradise Lost_, that the bounding peculiarity between the human condition of being and the angelic one he is describing is the law of gravitation. We, and all that is cognisable by us, are subject to this law; but Creation may be peopled with beings who are not subject to it, and to us these beings are as if they were not. But, whenever one of those beings becomes cognisable by us, he instantly becomes subject to gravitation; and he must resume his own mode of being ere he can be free from its consequences. The Angels were not subject to gravitation; that is to say, they had the means of moving in any direction at will. When they rebelled, and were punished by expulsion from Heaven, they did not _fall_ out; for, in fact, so far as the description intimates, there existed no planet, no distinct material element, towards which they could gravitate. They were _driven_ out by a pursuing fire. Then, after their fall, they had the power of rising upward, of navigating space, of quitting Hell, directing their flight to one glittering planet, alighting on its rotund surface, and then bounding off again, and away to another. A corollary of this fundamental difference between the human condition of being and the angelic would be that angels are capable of direct vertical action, whereas men are capable mainly of horizontal.