text: The irrational part of the soul is twofold: the one part is spirited, ambitious, uncontrolled; its seat is in the passions; the other is lowly, sluggish, and devoted to pleasure. Philosophers have neglected the former, which, though unbridled, is yet better, and is certainly more courageous and more worthy of a man, and have regarded the latter, which is nerveless and ignoble, as indispensable to the happy life. They have ordered reason to serve this latter; they have made the Supreme Good of the noblest living being an abject and mean affair, and a monstrous hybrid, too, composed of various members
  which harmonize but ill. For as our Vergil, describing Scylla, says