Now comes the crux of the whole matter. So far as I can follow the teachings of the ancient sages, the path which stretches before mankind appears to have four gates set at intervals along its course. The first is open to the great majority of mankind and might be named "religion, theology, and scholasticism." The second is open to a much smaller number of persons and could conveniently be named Mysticism. The third which is rarely opened (for it is heavy and hard to move) is "the philosophy of truth," whilst the final gate has been entered only by the supermen of our species; it may be titled "Realization." Few readers would care to wander with me into the wilderness whither it leads. I refuse to tarry in the limited phases of development and have gone forward in further quest of the sublime verity which is presented to us as life's goal by the sages. I value tolerance. Let others believe or follow what suits or pleases them most; I trust they will allow me the same freedom to continue my own quest.
-- Notebooks Category 12: Reflections > Chapter 5: The Literary Work > # 176