It is not a merit to be proclaimed but a defect to be deplored when mysticism would put a taboo on modern knowledge and scientific attitudes. The medievally-disposed mystic who looks down upon the practical inventions and mental achievements of science is not really being spiritual, as he believes, but merely being foolish. And those who scorn literature and vaunt anti-intellectualism are dreamers of the dreamiest kind. Sharpness of intelligence and breadth of experience are not only at a large discount in such circles but are actually regarded with disfavour. You will not find the kingdom of heaven between the covers of a book, but you may find some ideas which could point the way to the kingdom. If so, the book has served you well. Mystical denunciations of intellectual activity find their logical conclusion in the advocacy of absolute idiocy, in futile stagnation. Moreover, we need the intellectually formulated doctrines to guide our thinking and conduct because we cannot hold for long the moods of religious reverence and mystical inspiration. They give us something to hold on to when we are bereft of inward experience. The endeavour to make a scientific analysis of the contradictory situations which arise in meditational practice or mystical doctrine and thus clarify its issues, is often avoided with horror as being blasphemous! Those who are afraid to look such shortcomings in the face--or who even deny that they exist--are not suited for philosophy. We may find in their uncritical enthusiasms and vague outlooks and anti-rational attitudes some of the grounds why mysticism has not commended itself to the educated Western mind. For the latter expects and rightly expects that what is claimed to be a higher way of life should surely raise and not lower the level of intelligence of its readers.
-- Notebooks Category 16: The Sensitives > Chapter 2: Phases of Mystical Development > # 183