There are two sets of critics who match themselves against philosophy. There are the hard materialists, on the one hand, and the imperfect mystics, on the other. The first are guided by reason but limited to sense-experience; the second are guided by intuition but limited to meditation-experience. Both are incomplete. Both are opposed to each other as well as to philosophy, which understands, appreciates, and accepts both as expressing necessary but partial views which should be included in a fuller and more integral view.
-- Notebooks Category 20: What Is Philosophy? > Chapter 1: Toward Defining Philosophy > # 7