"[I]n the simple and easily surveyed life of the brutes the emptiness and vanity of the struggle of the whole phenomenon is more easily grasped. The variety of the organisations, the ingenuity of the means, whereby each is adapted to its element and its prey contrasts here distinctly with the want of any lasting final aim; instead of which there presents itself only momentary comfort, fleeting pleasure conditioned by wants, much and long suffering, constant strife, bellum omnium [all war], each one both a hunter and hunted, pressure, want, need, and anxiety, shrieking and howling; and this goes on in secula seculorum [for eternity], or till once again the crust of the planet breaks."