CCIII How Theology Has Fettered Human Morals and Retarded the Progress of Enlightenment, of Reason, and of Truth
How many subterfuges and mental gymnastics all the ancient and modern thinkers have employed, in order to avoid falling out with the ministers of the Gods, who in all ages were the true tyrants of thought! How Descartes, Malebranche, Leibnitz, and many others have been compelled to invent hypotheses and evasions in order to reconcile their discoveries with the reveries and the blunders which religion had rendered sacred! With what prevarications have not the greatest philosophers guarded themselves even at the risk of being absurd, inconsistent, and unintelligible whenever their ideas did not correspond with the principles of theology! Vigilant priests were always ready to extinguish systems which could not be made to tally with their interests. Theology in every age has been the bed of Procrustes upon which this brigand extended his victims; he cut off the limbs when they were too long, or stretched them by horses when they were shorter than the bed upon which he placed them.
What sensible man who has a love for science, and is interested in the welfare of humanity, can reflect without sorrow and pain upon the loss of so many profound, laborious, and subtle heads, who, for many centuries, have foolishly exhausted themselves upon idle fancies that proved to be injurious to our race? What light could have been thrown into the minds of many famous thinkers, if, instead of occupying themselves with a useless theology, and its impertinent disputes, they had turned their attention upon intelligible and truly important objects. Half of the efforts that it cost the genius that was able to forge their religious opinions, half of the expense which their frivolous worship cost the nations, would have sufficed to enlighten them perfectly upon morality, politics, philosophy, medicine, agriculture, etc. Superstition nearly always absorbs the attention, the admiration, and the treasures of the people; they have a very expensive religion; but they have for their money, neither light, virtue, nor happiness.