The book reflects the worldview of Yogacharya B.K.S. Iyengar and contains the essence of his ideas about yoga, which he came to in his many years of sadhana. “The very essence of my teaching is the desire to show with maximum practicality and benefit that any component of yoga, brought to perfection, contains the essence of other aspects, the macrocosm in the microcosm, or the general in the particular, just as the genetic code is contained in the DNA of each of our cells.”