I am enough of the artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
('The Saturday Evening Post' 1929)
I have no doubt that our thinking goes on for the most part without the use of signs (words), and, furthermore, largely unconsciously. For how, otherwise, should it happen that sometimes we "wonder" quite spontaneously about some experience? This "wondering" appears to occur when experience comes into conflict with a world of concepts that is already sufficiently fixed within us.
('Autobiographical Notes' Schilpp, 1949, pp. 8-9)