William James. Letter to Théodore Flournoy. 28 Sep 1909. The Letters of William James, vol. 2. Atlantic Monthly Press. 1920.
I hope that Freud and his pupils will push their Ideas to their utmost limits, so that we may learn what they are. They can’t fail to throw light on Human Nature, but I confess that he made on me personally the impression of a man obsessed with fixed ideas. [Or arrogant, like Steven Pinker & Richard Dawkins.] I can make nothing in my own case with his dream Theories, and obviously “symbolism” is a most dangerous Method.