Thus Turgot's conception of progress regards it mainly, if not entirely, as a gradual dawn and diffusion of light, the spreading abroad of the rays of knowledge. He does not assert, as some moderns have crudely asserted, that morality is of the nature of a fixed quantity; still he hints something of the kind. 'Morality,' he says, speaking of Greece in the time of its early physical speculation, 'though still imperfect, still kept fewer relics of the infancy of reason. Those everspringing necessities which so incessantly recall man to society, and force him to bend to its laws, that instinct, that sentiment of what is good and right, which Providence has engraved in all hearts, and which precedes reason, all lead the thinkers of every time back to the same fundamental principles of the science of morals.' We meet with this limitation of the idea of progress in every member of the school to which, more than to any other, Turgot belonged. Even in the vindication of the claims of Christianity to the gratitude of mankind, he had forborne from laying stress on any original contribution, supposed to be made by that religion to the precious stock of ethical ideas. He dwells upon the 'tender zeal for the progress of truth that the Christian religion inspired,' and recounts the various circumstances in which it spread and promoted the social and political conditions most favourable to intellectual or scientific activity. Whatever may be the truth or the value of Christianity as a dogmatic system, there can be little doubt that its weight as a historic force is to be looked for, not so much in the encouragement it gave to science and learning, in respect of which Western Europe probably owes more to Mahometanism, as in the high and generous types of character which it inspired. A man of rare moral depth, warmth, or delicacy, may be a more important element in the advance of civilisation, than the newest and truest deduction from what Turgot calls 'the fundamental principles of the science of morals.' The leading of souls to do what is right and humane, is always more urgent than mere instruction of the intelligence as to what exactly is the right and the humane. The saint after all has a place in positive history; but the men of the eighteenth century passionately threw him out from their calendar, as the mere wooden idol of superstition. They eagerly recognised the genius of scientific discovery; but they had no eyes for the genius of moral holiness. Turgot, far as he was from many of the narrownesses of his time, yet did not entirely transcend this, the worst of them all. And because he could not perceive there to be any new growths in moral science, he left out from a front place among the forces that have given strength and ripeness to the human mind, the superior capacity of some men for kindling, by word and example, the glowing love and devout practice of morality in the breasts of many generations of their fellows.