But this, which was the strength of the ideal of the Greeks, was also its limitation. Their ethical system rested not only on universal facts of human nature, but also on a particular and transitory social arrangement. When therefore the city State, with its sharp antithesis of classes, began to decline, the ideal of the soldier-citizen declined also. The conditions of its realisation no longer existed, and ethical conceptions passed into a new phase. In the first place the ideal of conduct was extended so as to apply to man as man, instead of to a particular class in a particular form of State; and in the second place, as a corollary of this, those external goods of fortune which were the privilege of the few, could no longer be assumed as conditions of an ideal which was supposed to apply to all. Consequently the new ideal was conceived as wholly internal. To be virtuous was to act under the control of the universal reason which was supposed to dwell in man as man; and such action was independent of all the gifts of chance. It was as open to a slave as to a freeman, to an artisan as to a soldier or a statesman. The changes and chances of this mortal life were indifferent to the virtuous man; on the rack as on the throne he was lord of himself and free. This conception of the Stoics broke down the limitation of the Greek ideal by extending the possibility of virtue to all mankind. But at the same time it destroyed its sanity and balance. For it was precisely because of its limitation that the ideal of the Greeks was, approximately at least, an account of what was, and not merely of what ought to be. A man possessed of wealth and friends, of leisure, health, and culture, really could and did achieve the end at which he was aiming; but the conception of one who without any such advantages, on the contrary with positive disadvantages, poor, sickly, and a slave perhaps, or even in prison or on the rack, should nevertheless retain unimpaired the dignity of manhood and the freedom of his own soul--, such a conception if it is not chimerical, is at any rate so remote from common experience, that it is not capable of serving as a really practical ideal for ordinary life. But an ideal so remote that its realisation is despaired of, is as good as none. And the conception of the Stoics, if it was more comprehensive than that of Aristotle, was also less practical and real.