Zeal, dogmatism and idealism exist only because we are forever committing intellectual sins. We sin by attributing concrete significance to meaningless pseudo-knowledge; We sin in being too lazy to think in terms of multiple causation and indulging instead in over-simplification, over-generalization and over-abstraction; And we sin by cherishing the false but agreeable notion that conceptual knowledge and, above all, conceptual pseudo-knowledge are the same as understanding.
~ Aldous Huxley
slip:4a615.