All metaphysical study and all mystical exercises are but preparations for this flash of reality across the sky of consciousness which is here termed insight. The latter is therefore the most important experience which awaits a human being on this earth. If metaphysics or mysticism is regarded as an end in itself and not as a preliminary, then its follower misses what lies at the core of one's life.
-- Notebooks Category 20: What Is Philosophy? > Chapter 4: Its Realization Beyond Ecstasy > # 155