"Philosophy is something intermediate between theology and science. Like theology, it consists of speculations on matters as to which definite knowledge has, so far, been unascertainable; but like science, it appeals to human reason rather than authority, whether that of tradition or that of revelation. All definite knowledge—so I should contend—belongs to science; all dogma as to what surpasses definite knowledge belongs to theology. But between theology and science there is a No Man’s Land, exposed to attack by both sides; this No Man’s Land is philosophy."
~ Bertrand Russell "A History of Western Philosophy" (1945) Introductory, p. xiii