From the moment that science concerns itself with man only, and the action of the mind; from the moment that its end becomes not simply material enjoyment, but moral elevation, the questions it discusses become indeed more complex, but the answer, when found, is more prolific in results. Wealth, then, is treated only as one of the forces of civilization. Other interests than purely material ones occupy the first place. This matter-of-fact philosophy which, according to Bacon’s precept, seeks to improve the conditions of life, bears in mind, that the most fruitful source of material development lies in intellectual development. It humbly recognizes that it is not the first-born of the family, and draws new strength from this avowal. From the moment that it is the mind which _produces_ and which governs the world, intellectual and moral perfection become the cause and effect of material progress. “But seek ye first the kingdom of God and his righteousness, and all these things shall be added unto you.” The increase of production, then, appears an instrument of elevation in the moral order.(23) It is energy of soul, intelligence and manly virtue which constitute the chief source of the wealth of nations; which create it, develop it, and preserve it. Wealth increases, declines, and disappears with the increase, decline and disappearance of these noble attributes of the soul. Labor is the child of thought. Nothing happens in the external world which was not first conceived in the mind. The hand is the servant of the intellect; and its work is successful, beautiful or useful in proportion to the activity and development of the intellect, and in proportion as the just, the beautiful and the good exert their power over it. Production is, therefore, not a material, but a spiritual, work. How, then, can acts and their morality be separated? How not understand that the market of labor has its own distinct laws, and that education, even from a material stand-point, becomes the highest interest and the most important duty of society, since on it depends the efficiency of labor? From the time that, after a long series of years, the doctrine of Christianity had permeated the law of the civilized world; from the time that the teaching of Paul, that all men are children of one Father, took form and body, and that the principle of the equality of all men before their Maker, was supplemented by the doctrine and by the practice of that equality before the laws, the thinking masses have endeavored to discover the wherefore of their actions, and the why of their sufferings. They have called the past to account, and inquired why they have obtained so limited a share.