The yogi who achieves the capacity to be without thoughts for a certain period of time is still the victim of time, unless he has sought to understand its meaning, its nature, and above all what lies behind it. This latter is a philosophic work. If it is used to support yoga or if yoga is used to prepare the way for it, a proper relationship is established; otherwise we may have the spectacle of Swamis who come to the West after lengthy meditations and begin to betray signs of erratic conduct--signs which I do not need to describe.
-- Notebooks Category 20: What Is Philosophy? > Chapter 4: Its Realization Beyond Ecstasy > # 127