I must adduce some observations and experiments from the many I have made on this subject.  It may be objected that if animals in their spontaneous perception personify the object in question, they would give signs of this fact with respect to all the objects with which they come in contact, and among which they live, and yet they remain indifferent to many of them, which is a proof that they distinguish the animate from the inanimate.  In fact it cannot be disputed that a vast number of the phenomena and objects of nature are regarded by animals with indifference; they are perceived by them, but it does not appear that they suppose these things to be endowed with life.  It is, however, necessary in the first place to distinguish two modes and stages in this animation of things, one of which we may term static, and the other dynamic.  In the first instance, the sentient subject remains tranquil at the very moment when he vivifies the phenomenon or the thing perceived; while the act is accomplished with so much animating force, and with an implicit and fugitive consciousness, it exerts no immediate and sudden influence on the perceiving animal, and consequently he gives no external signs of the personifying character of his perception.  In the second instance, which we have termed dynamic, that is, when the phenomenon or object has a direct and sudden effect on the animal himself, he expresses by his movements; gestures, cries, and other signs, how instantaneously he considers and feels the object in question to be alive, for he behaves in exactly the same way towards real animals.

Animals are accustomed to show such indifference towards numerous objects that it might be supposed that they have an accurate conception of what is inanimate; but this arises from habit, from long experience, and partly also from the hereditary disposition of the organism towards this habit.  But if the object should act in any unusual way, then the animating process which, as we have just said, was rendered static by its habitual exercise, again becomes dynamic, and the special and permanent character of the act is at once revealed.  We have experience of this fact in ourselves, although we are now capable of immediately distinguishing between the animate and the inanimate, and man alone has, or can have, a rational conception of what are really cosmic objects or things.  Yet if we suddenly and unexpectedly see some object move in a strange way, which we know from experience to be inanimate, the innate inclination to personify it takes effect, and for a moment we are amazed, as if the phenomenon were produced by deliberate power proper to itself.