Doubt is the beginning of wisdom. It means caution, independence, honesty and veracity. Faith means negligence, serfdom, insincerity and deception. The man who never doubts never thinks. He is like a straw in the wind or a waif on the sea. He is one of the helpless, docile, unquestioning millions, who keep the world in a state of stagnation, and serve as a fulcrum for the lever of despotism. The stupidity of the people, says Whitman, is always inviting the insolence of power.

"The Gospel of Freethought", p. 104 - Flowers of Freethought (1893)