The practice of yoga as a psychological discipline and the study of philosophy as a mental re-education are two essentials in the equipment of the man who would explore the highest. None may be left out without leaving the seeker like a one-legged man trying to ascend a difficult mountain. The ultimate goal cannot be found by the yogi because he is concerned only with himself and not the entire universe. It cannot be found by the philosopher because he is concerned only with the theoretical knowledge of its meaning of all existence. It can be found by him alone who has mastered both yoga and philosophy, and who is then willing to take the next step and sacrifice his ego on the altar of ultimate attainment. For the final stage of this climb demands that the insight gained by philosophic knowledge into the ego's true nature be applied to the entire life of thought, feeling, and conduct--not by some sudden dramatic gesture but by working incessantly during every moment of every day. Such a perpetual vigil is really a form of continuous concentration, that is, of yoga, and it is impossible for those who have not successfully trained their minds in the yogic discipline. These are the reasons why we must view yoga and philosophy as the two legs needed to support a man who would then enter into the ever-renewed practice to attain realization. This is the final climb to the summit.
-- Perspectives > Chapter 1: Overview of the Quest > # 65
