For of his having such a son as Commodus, too, one must say that he is not to be blamed on that account, but that he is unfortunate. Disposition and temperament are inexplicable things; there are natures on which the best education and example are thrown away; excellent fathers may have, without any fault of theirs, incurably vicious sons. It is to be remembered, also, that Commodus was left, at the perilous age of nineteen, master of the world; while his father, at that age, was but beginning a twenty years' apprenticeship to wisdom, labor, and self-command, under the sheltering teachership of his uncle Antoninus. Commodus was a prince apt to be led by favorites; and if the story is true which says that he left, all through his reign, the Christians untroubled, and ascribes this lenity to the influence of his mistress Marcia, it shows that he could be led to good as well as to evil. But for such a nature to be left at a critical age with absolute power, and wholly without good counsel and direction, was the more fatal. Still one cannot help wishing that the example of Marcus Aurelius could have availed more with his own only son. One cannot but think that with such virtue as his there should go, too, the ardor which removes mountains, and that the ardor which removes mountains might have even won Commodus. The word _ineffectual_ again rises to one's mind; Marcus Aurelius saved his own soul by his righteousness, and he could do no more. Happy they who can do this! but still happier, who can do more! Yet, when one passes from his outward to his inward life, when one turns over the pages of his _Meditations_,--entries jotted down from day to day, amid the business of the city or the fatigues of the camp, for his own guidance and support, meant for no eye but his own, without the slightest attempt at style, with no care, even, for correct writing, not to be surpassed for naturalness and sincerity,--all disposition to carp and cavil dies away, and one is overpowered by the charm of a character of such purity, delicacy, and virtue. He fails neither in small things nor in great; he keeps watch over himself both that the great springs of action may be right in him, and that the minute details of action may be right also. How admirable in a hard-tasked ruler, and a ruler too, with a passion for thinking and reading, is such a memorandum as the following:-- "Not frequently nor without necessity to say to any one, or to write in a letter, that I have no leisure; nor continually to excuse the neglect of duties required by our relation to those with whom we live, by alleging urgent occupation."[219] And, when that ruler is a Roman emperor, what an "idea" is this to be written down and meditated by him:--