1. " which is superior to ordinary gymnastics and breathing exercises, inasmuch as it is not merely mechanistic and scientific, but also philosophical; in its training of the parts of the body, it unites them with the whole of the spirit, as is quite clear, for instance, in the Pranayama exercises where Prana is both the breath and the universal dynamics of the cosmos. When the thing which the individual is doing is also a cosmic event, the effect experienced in the body (the innervation), unites with the emotion of the spirit (the universal idea), and out of this there develops a lively unity which no technique, however scientific, can produce. Yoga practice is unthinkable, and would also be ineffectual, without the concepts on which Yoga is based. It combines the bodily and the spiritual with each other in an extraordinarily complete way. In the East, where these ideas and practices have developed, and where for several thousand years an unbroken tradition has created the necessary spiritual"
- Paramahansa Yogananda, Autobiography of a Yogi