It is a general complaint among mankind, Paulinus, that Nature is niggardly: our allotted span is brief, and the term granted us flies by with such dizzy speed that all but a few exhaust it just when they are beginning to live. And it is not only the unthinking masses who bemoan what they consider the universal evil: the same sentiment has evoked complaints even from men of distinction. Hence the cry of that prince of physicians (Hippocrates), "Life is short, art long." Hence Aristotle's grievan...