Many people think they are thinking when they are merely rearranging their prejudices.

A related quote is in James's Pragmatism: A New Name for Some Old Ways of Thinking (1907) (see above): "Our minds thus grow in spots; and like grease-spots, the spots spread. But we let them spread as little as possible: we keep unaltered as much of our old knowledge, as many of our old prejudices and beliefs, as we can. We patch and tinker more than we renew. The novelty soaks in; it stains the ancient mass; but it is also tinged by what absorbs it."