He says, then, that upon the frontiers of his kingdom there are animals that have always been at war among themselves, their passion for fighting having been handed down from father to son. These animals, he explains, are allied to the fox. Never has the science of war been more skilfully pursued among men than it is pursued by these beasts, not even in our present century. They have their advanced out-posts, their sentinels and spies; their ambuscades, their expedients, and a thousand other inventions of the pernicious and accursed science Warfare, a hag born, herself, of Styx,[10] but giving birth to heroes. Properly to sing of the battles of these four-footed warriors Homer should return from beyond the shores of Acheron.[11] Ah! could he but do so, and bring with him too the rival of old Epicurus,[12] what would the latter say as to the examples I have narrated? He would say only what I have already said, namely, that in the lower animals natural instinct is sufficient to explain all the wonders I have told: that memory leads the animal to repeat over and over again the actions it has made before and found successful. We, as human beings, do differently. Our wills decide for us; not the bestial aim, nor the instinct. I walk, I speak, I feel in me a certain force, an intelligent principle which all my bodily mechanism obeys. This force is distinct from anything connected with my body. It is indeed more easily conceived than is the body itself, and of all our movements it is the supreme controller. But how does the body conceive and understand this intelligent force? That is the point! I see the tool obeying the hand; but what guides the hand? Who guides the planets in their rapid courses? It may be some angel guide controls the whirling planets; and in like manner some spirit dwells in us and controls all our machinery. The impulse is given--the impression made--but how, I do not know! We shall only learn it in the bosom of God; and to speak frankly, Descartes himself was no wiser. On that point we all are equals. All that I know is that this intelligent controlling spirit does not exist in the lower animals. Man alone is its temple. Nevertheless, we must allow to the beasts a higher plane than that of plants, notwithstanding the fact that plants breathe.