The greatness of yoga simply explained by Ashtanga master David Swenson:
Practicing yoga is a constant evolution. The Ashtanga system can appear very rigid, with its predetermined sequences, but actually there’s great freedom within its structure. From the repetition, we learn to find depth in the minutiae of the actions and the wonder of breath and prana. In the beginning, I was fascinated by making amazing shapes with the body, but the longer we practice, the more our attention naturally drifts within. The real riches of yoga cannot be seen; they are felt and experienced from the inside out.”
[Thanks to Marina at Bikram Yoga Musings]