58. This (being) alone, of those that are on the earth, collects together, by (his) rational knowledge, the doctrines relating to all (things); the science and composition of music, as well as (that of) investigation by discussion. He also proceeds on to the manner of life, and to the fame attendant on philosophy ; and (thus) he hastens forward the love of that superiority, which is vested within him : availing himself, not of the bodily sense, but of the faculty of knowledge, and of the stimulating power of reason.