In The Hidden Teaching Beyond Yoga I most unfortunately gave the impression that the higher truth was only to be got as an understanding--in contrast with the mystic's realization, which was only an experience. Within a few weeks of its publication I wrote and issued an "Appendix" to clear up this matter and had it incorporated in the printed text in all further editions. Moreover, in the sequel, The Wisdom of the Overself I returned again to the same point, explaining again that the philosophic insight is a fusion of both knowledge and realization, understanding and experience.
-- Notebooks Category 20: What Is Philosophy? > Chapter 4: Its Realization Beyond Ecstasy > # 160