We have seen that the attainment of autonomy in the spiritual life implies a reversion of the original order of things, and that the whole of life is thus seen in a new light. It follows that no real morality can be engendered merely by developing existing conditions, or heightening natural forces. Wherever this was attempted, closer investigation will always show the presence of both the lower and the higher phase, and the consequent weakening of morality. Here Christianity has achieved something of world-wide historical importance: it clearly demonstrated the gulf between all merely natural development and real moral action; it has also shown us that something essentially new appears in morality, something unattainable by merely ennobling nature. This was not only the case with religion, for the deepest thinkers of all times have seen in morality not a mere intensification, but a complete transformation. Plato made real virtue dependent on aspiration to the world of ideas. He distinguished this virtue from all that men call virtue, though to him it was little more than physical ability. Kant advocated something similar, by forbidding man to base action on inclination alone. He even went so far as to make action against natural inclination a sign of good principle. The requirement thus formulated does not preclude fruitful moral germs and impulses in the existing order of things; but their full development is only possible when a distinct reversion has taken place, and when an independent spiritual life purifies, unites, and exalts all beginnings. These alone can never, by a slow process of evolution, raise life to the plane of genuine spirituality. As we have seen, the morality of the spiritual life rejects a merely natural origin. But because it represents something essentially new, its main object cannot consist in the denial and suppression of mere nature. This was the aim of asceticism, especially in its development as a reaction against the antique over-estimation of nature. In the latter days of antiquity, life was swamped and enfeebled by a refined form of sensuality. Life could only develop if this sensuality was resisted and full supremacy was advocated for the spiritual. We can understand that those engaged in this struggle went so far as to see the highest morality in the complete suppression of sensual life. This bears witness to admirable personal feeling; and yet it was a dangerous error, for it diverted men from the great task of giving inner significance to life, and of filling it with strong and healthy love. The strictest asceticism can be united to inner hollowness, to spiritual pride, and to want of love. An ascetic element is inseparable from all morality, but only an element subject to higher aims. We feel it to have been one of the great merits of the Reformation, that it set aside the mediæval appreciation of asceticism.