“Any honest thinker has to admit the insecurity of all metaphysical positions, and in particular of all creeds. He has also to admit the unwarrantable nature of all metaphysical assertions and face the fact that there is no evidence whatever for the ability of the human mind to pull itself up by its own bootstrings, that is, to establish anything transcendental. Materialism is a metaphysical reaction against the sudden realization that cognition is a mental faculty and, if carried beyond the human plane, a projection. The reaction was ‘metaphysical’ in so far as the man of average philosophical education failed to see through the implied hypostasis, not realizing that ‘matter’ was just another name for the supreme principle. As against this, the attitude of faith shows how reluctant people were to accept philosophical criticism. It also demonstrates how great is the fear of letting go of one’s hold on the securities of childhood and of dropping into a strange, unknown world ruled by forces unconcerned with man. Nothing really changes in either case; man and his surroundings remain the same. He has only to realize that he is shut up inside his mind and cannot step beyond it, even in insanity; and that the appearance of his world or of his gods very much depends upon his own mental condition.” – Carl Gustav Jung, “Eastern and Western Thinking” (trans. R.F.C. Hull)