[33] For the athletes of vigorous health and high spirit have erected their servile bodies as a sort of fortification against the soul, but those men who have been devoted to the pursuit of instruction, and who are pale, and weak, and emaciated, having overloaded the vigour of the body with the powers of the soul, and, if one must tell the plain truth, being entirely dissolved into one species of soul, have through the energy of their minds become quite disentangled from the body.