It is not too much to say that next after the passion to learn there is no quality so indispensable to the successful prosecution of science as imagination. Find me a people whose early medicine is not mixed up with magic and incantations, and I will find you a people devoid of all scientific ability.
-- Charles Sanders Peirce (1839–1914), U.S. philosopher, logician. From notes for a projected history of science c. 1896. Collected Papers, vol. 1, para. 47, Harvard University Press (1934).