Leaving aside metaphysical questions, however, we may be able to find, as in physical science, some constants or ultimate elements which, though they, according to the metaphysician's view, require further analysis, yet constitute, within their sphere, scientific knowledge independent of metaphysics. The follower of Hegel means, in all probability, precisely the same thing as the follower of Hume, when he says that a mother loves her child; though, when they come to reflect upon certain ulterior imports of the phrases used, they may come to different conclusions. The formula remains the same; for all purposes of conduct it evokes the same impressions, sentiments, and sensible images, and it therefore represents a stage at which all theories must coincide, though they start, or profess to start, from the most opposite bases. "Mothers love their children" is not unconditionally true; some mothers do not love their children; but the statement is of worth as approximating scientific truth. It may be well to attempt to ascertain in how far it may be rendered scientific. In the physical sciences, the statements of laws arrived at by the labor of generations are ideal statements, in which a mass of modifying circumstances are disregarded for the sake of simplification. Even in these sciences, the power of prediction is small. Of the complicated conditions of human action we have even less accurate knowledge than of those of physical phenomena, though this does not lead us, any more than in the physical sciences, to suppose that prediction would not be possible if we knew the conditions. So far as man is a thing or an animal, it is comparatively easy to determine his conduct. Given a starving dog and a lump of meat in contact, you can predict the result. But to determine the behavior of a human being with a glass of water presented to his lips, you must be able to calculate the action of human motive and to unravel the tangled skein of thought and feeling in its variation in the individual under consideration. Moreover, much of the life of the individual is ruled, not by conscious motive, but by automatic habit, acquired through education. The prediction of action in society as a unit is not less difficult than the prediction of individual action, for if individual differences neutralize each other, so that a certain uniformity in the influence of circumstances is shown by statistics, it is not the less difficult to predict what these uniformities will be. Society as an organism, not a mere aggregate, presents, in the interaction of more complicated conditions, greater difficulties than does the individual as such; and it may be said that prediction of the course of history, even in general terms and for a brief period, would require an intellect as much superior to that of Socrates as the intellect of Socrates is superior to that of an ape.