Exact science, then, is first of all based on the naïve belief in an objective and real world whose events are connected in an orderly and prescribed manner, and occur independently of our thought or will. The phenomena of this objective world appeal to us through our sense-organs by some form of action, which we call energy, and are interpreted by our minds. We speak of this interpretation as observation; but to be scientific we must also select the phenomena to be observed, in order that we may classify their similarities and their dissimilarities. In the course of time, we have found such precision in many of our classifications and such regularity in the past actions of phenomena, that we are able to predict future events. Those predictions, which from past experience we find to have been accurately verified, we formulate as laws. For example, we have observed the actions of so many falling bodies that we have formulated the law of gravitation. It would be an error to say that a body fell, yesterday, because of this law; that event was simply one of the observed facts from which the law was deduced; but it is quite proper to predict that such a body will fall, to-morrow, in accordance with the law of gravitation. To sum up, the scientific method is limited to experimental observation and the formulation of laws; its value lies in the fact that, by its cultivation, we have done much to allay our apprehensions for the future and thus have abated the edge of superstition; and we also have vastly increased our power over our environment, or, in the much misunderstood aphorism of Francis Bacon, we have found science to be valuable for its fruits. In a general way, we may say that the scientist should follow in his investigations the phenomena of the objective world only until their special forms of energy are absorbed by our nervous system. It is in the province of the humanist to study the phenomena of the subjective world after these stimuli have been translated into emotion and thought.