"Finally, a third cause of confusion was the civil organization of ancient states. When the people began to apply themselves to agriculture, the formation of a rural calendar, requiring a continued series of astronomical observations, it became necessary to appoint certain individuals charged with the functions of watching the appearance and disappearance of certain stars, to foretell the return of the inundation, of certain winds, of the rainy season, the proper time to sow every kind of grain. These men, on account of their service, were exempt from common labor, and the society provided for their maintenance. With this provision, and wholly employed in their observations, they soon became acquainted with the great phenomena of nature, and even learned to penetrate the secret of many of her operations. They discovered the movement of the stars and planets, the coincidence of their phases and returns with the productions of the earth and the action of vegetation; the medicinal and nutritive properties of plants and fruits; the action of the elements, and their reciprocal affinities. Now, as there was no other method of communicating the knowledge of these discoveries but the laborious one of oral instruction, they transmitted it only to their relations and friends, it followed therefore that all science and instruction were confined to a few families, who, arrogating it to themselves as an exclusive privilege, assumed a professional distinction, a corporation spirit, fatal to the public welfare. This continued succession of the same researches and the same labors, hastened, it is true, the progress of knowledge; but by the mystery which accompanied it, the people were daily plunged in deeper shades, and became more superstitious and more enslaved. Seeing their fellow mortals produce certain phenomena, announce, as at pleasure, eclipses and comets, heal diseases, and handle venomous serpents, they thought them in alliance with celestial powers; and, to obtain the blessings and avert the evils which they expected from above, they took them for mediators and interpreters; and thus became established in the bosom of every state sacrilegious corporations of hypocritical and deceitful men, who centered all powers in themselves; and the priests, being at once astronomers, theologians, naturalists, physicians, magicians, interpreters of the gods, oracles of men, and rivals of kings, or their accomplices, established, under the name of religion, an empire of mystery and a monopoly of instruction, which to this day have ruined every nation. . . ."