Superstition
From 'The Natural History of Religion', in Four Dissertations by David Hume (1757)

THE universal propensity to believe in invisible, intelligent power, if not an original instinct, being at least a general attendant of human nature, may be considered as a kind of mark or stamp, which the divine workman has set upon his work; and nothing surely can more dignify mankind, than to be thus selected from all the other parts of the creation, and to bear the image or impression of the universal Creator. But consult this image, as it commonly appears in the popular religions of the world. How is the deity disfigured in our representations of him! What caprice, absurdity, and immorality are attributed to him! How much is he degraded even below the character which we should naturally, in common life, attribute to a man of sense and virtue!

What a noble privilege is it of human reason to attain the knowledge of the supreme Being; and, from the visible works of nature, be enabled to infer so sublime a principle as its supreme Creator. But turn the reverse of the medal. Survey most nations and most ages. Examine the religious principles, which have, in fact, prevailed in the world. You will scarcely be persuaded, that they are other than sick men's dreams: Or perhaps will regard them more as the playsome whimsies of monkeys in human shape, than the serious, positive, dogmatical asseverations of a being, who dignifies himself with the name of rational.

Hear the verbal protestations of all men: Nothing they are so certain of as their religious tenets. Examine their lives: You will scarcely think that they repose the smallest confidence in them.

The greatest and truest zeal gives no security against hypocrisy: The most open impiety is attended with a secret dread and compunction.

No theological absurdities so glaring as have not, sometimes, been embraced by men of the greatest and most cultivated understanding. No religious precepts so rigorous as have not been adopted by the most voluptuous and most abandoned of men.