“ The human understanding is no dry light, but receives infusion from the will and affections; whence proceed sciences which may be called ‘sciences as one would’. For what a man had rather were true he more readily believes. Therefore he rejects difficult things from impatience of research; sober things, because they narrow hope; the deeper things of nature, from superstition ”
 Carl Sagan, The Demon-Haunted World (1995). copy citation