When he is inflamed with rage, and meditates doing some one a grievous injury, he should bring the thing vividly before his mind, as a _fait accompli_; he should clearly picture to himself this other fellow-being tormented with mental or bodily pain, or struggling with need and misery; so that he is forced to exclaim: "This is my work!" Such thoughts as these, if anything, will avail to moderate his wrath. For Compassion is the true antidote of anger; and by practising on oneself this artifice of the imagination, one awakes beforehand, while there is yet time, _la pitié, dont la voix,_ _Alors qu'on est vengé, fait entendre ses lois_.[5] --(Voltaire, _Sémiramis_, V. 6.) And in general, the hatred we may cherish for others is overcome by nothing so easily as by our taking a point of view whence they can appeal to our Compassion. The reason indeed why parents, as a rule, specially love the sickly one of their children is because the sight of it perpetually stirs their Compassion. (7) There is another proof that the moral incentive disclosed by me is the true one. I mean the fact that animals also are included under its protecting aegis. In the other European systems of Ethics no place is found for them,--strange and inexcusable as this may appear. It is asserted that beasts have no rights; the illusion is harboured that our conduct, so far as they are concerned, has no moral significance, or, as it is put in the language of these codes, that "there are no duties to be fulfilled towards animals." Such a view is one of revolting coarseness, a barbarism of the West, whose source is Judaism. In philosophy, however, it rests on the assumption, despite all evidence to the contrary, of the radical difference between man and beast,--a doctrine which, as is well known, was proclaimed with more trenchant emphasis by Descartes than by any one else: it was indeed the necessary consequence of his mistakes. When Leibnitz and Wolff, following out the Cartesian view, built up out of abstract ideas their Rational Psychology, and constructed a deathless _anima rationalis_ (rational soul); then the natural claims of the animal kingdom visibly rose up against this exclusive privilege, this human patent of immortality, and Nature, as always in such circumstances, entered her silent protest. Our philosophers, owing to the qualms of their intellectual conscience, were soon forced to seek aid for their Rational Psychology from the empirical method; they accordingly tried to reveal the existence of a vast chasm, an immeasurable gulf between animals and men, in order to represent them, in the teeth of opposing testimony, as existences essentially different. These efforts did not escape the ridicule of Boileau; for we find him saying: _Les animaux ont-ils des universités?_ _Voit-on fleurir chez eux des quatre facultés?_[6]