On the whole, the scientist is better off if he collects his facts by accident, little by little, so he can study them before he tries to fit them into a jigsaw puzzle, This is how the late Tom Lethbridge came to arrive at his theories about other dimensions of reality. It is also how Guy Lyon Playfair came to develop his own theories about the nature of the poltergeist.

p. 196 - Poltergeist!: A Study In Destructive Haunting (1982)