[122] For whoever despises his teacher, and under the influence of an innate and habitual indolence forsakes what is in front of him, by means of which it may be in his power to see, and to hear, and to exert his other powers, so as to form a judgment in things of nature, and turns his head round so as to keep his eyes on what is behind him, that man has an admiration for blindness in the affairs of life, as well as in the parts of the body, and becomes a pillar, like a lifeless and senseless stone.