 We know that a stone is not aware of our action on it…. But as soon as we begin dealing with an animal, the relation changes…. There is, then, no doubt that, in my relation with the animal, the act of my behavior toward it is not, as it was in the case of the stone, unilateral; rather, my act, before being performed, when I am planning it, already calculates with the probable act of reaction on the animal’s part, in such a manner that my act, even in the state of pure project, moves toward the animal but returns to me in an inverted sense, anticipating the animal’s reply. (Obras, VII: 133–34)