Born an enemy to experience, theology, that supernatural science, was an invincible obstacle to the progress of the natural sciences, as it almost always threw itself in their way. It was not permitted to experimental philosophy, to natural history, to anatomy, to see any thing but through the jaundiced eye of superstition. The most evident facts were rejected with disdain, proscribed with horror, when ever they could not be made to quadrate with the idle hypotheses of superstition. Virgil, the Bishop of Saltzburg, was condemned by the church, for having dared to maintain the existence of the antipodes; Gallileo suffered the most cruel persecutions, for asserting that the sun did not make its revolution round the earth. Descartes was obliged to die in a foreign land. Priests, indeed, have a right to be the enemies to the sciences; the progress of reason must, sooner or later, annihilate superstitious ideas. Nothing that is founded upon nature, that is bottomed upon truth, can ever be lost; while the systems of imaginations, the creeds of imposture, must be overturned. Theology unceasingly opposed itself to the happiness of nations--to the progress of the human mind--to useful researches--to the freedom of thought; it kept man in ignorance; all his steps being guided by it, he was no more than a tissue of errors. Indeed, is it resolving a question in natural philosophy, to say that an effect which excites our surprise, that an unusual phenomenon, that a volcano, a deluge, a hurricane, a comet, &c. are either signs of divine wrath, or works contrary to the laws of nature? In persuading nations, as it has done, that the calamities, whether physical or moral, which they experience, are the effects of the divine anger, or chastisements which his power inflicts on them, has it not, in fact, prevented them from seeking after remedies for these evils? Would it not have been more useful to have studied the nature of things, to have sought in nature herself, or in human industry, for succours against those sorrows with which mortals are afflicted, than to attribute the evil which man experiences to an unknown power, against whose will it cannot be supposed there exists any relief? The study of nature, the search after truth, elevates the soul, expands the genius, is calculated to render man active, to make him courageous. Theological notions appear to have been made to debase him, to contract his mind, to plunge him into despondence. In the place of attributing to the divine vengeance those wars, those famines, those sterilities, those contagions, that multitude of calamities, which desolate the earth; would it not have been more useful, more consistent with truth, to have shewn man that these evils were to be ascribed to his own folly, or rather to the unruly passions, to the want of energy, to the tyranny of some princes, who sacrifice nations to their frightful delirium? The irrational people, instead of