The Evolution-theory may be clearly traced in the two next conceptions: Milton's Satan and Goethe's Mephistopheles. They differ as strongly as the periods and the poems in which they appear. Milton's Satan loses the vulgar flesh and bone, horn and hoof nature--he is an epic character; whilst Goethe's Devil is an active dramatic entity of modern times. Milton's representative of evil is a very powerful conception--it is evil in abstracto; whilst Mephistopheles is evil in concreto--the intelligible, tangible Devil, evolved by the power of selection from an antediluvian monster, and transformed through a civilizing process of at least six thousand years into its present form. Milton's Satan is a debased intellect who in his boundless ambition is still a supernatural being. Mephistopheles is the incarnation of our complicated modern social evils, full of petty tricks and learned quotations; he piously turns up his eyes, he lies, doubts, calumniates, seduces, philosophizes, sneers, but all in a polite and highly educated way; he is a scholar, a divine, a politician, a diplomatist. Satan is capable of wild enthusiasm, he sometimes remembers his bright sinless past; "from the lowest deep," he yearns, "once more to lift himself up, in spite of fate, nearer to his ancient seat;"--he hopes to re-enter heaven, "to purge off his gloom;" some remnant of heavenly innocence still clings to him, for, though _fallen_, he is still an _angel_! Mephistopheles in his real nature is without any higher aspirations, he argues with a sarcastic smile on his lips, he is ironical with sophisticated sharpness. Satan has unconsciously gigantic ideas, he is ready to wrestle with God for the dominion of heaven. Mephistopheles is perfectly conscious of his littleness as opposed to our better intellectual nature, and does evil for evil's sake. Satan is sublime through the grandeur of his primitive elements, pride and ambition. Mephistopheles is only grave in his pettiness; he does not refuse an orgie with drunken students, indulges in jokes with monkeys, works miracles in the witch's kitchen, delights in the witch's "one-time-one;" distributes little tracts "to stir up the witch's heart with special fire." Satan has nothing vulgar in him: he is capable of melancholy feelings, he can be pathetic and eloquent. Mephistopheles laughs at the stupidity of the world, and at his own. Satan believes in God and in himself, whilst Mephistopheles is the "Spirit that denies;" he believes neither in God nor in heaven nor in hell; he does not believe in his own entity--he is no supernatural, fantastic being, but man incarnate: he is the evil part of a good whole, which loses its entity when once seen and recognised in its real nature; for Mephistopheles in reality is our own ignorant, besotted, animal nature, cultivated and developed at the expense of our intellectual part.