Patanjali Yoga Sutras

The Yoga Sutras of Patanjali are the foundational texts of the science
of yoga. In this book, Sri Sri Ravi Shankar, a master of yoga for the
21st century, offers his own commentary on this fundamental work. "The
aim of Patanjali Yoga is to set man free from the cage of matter. Mind
is the highest form of matter and man freed from this dragnet of Chitta
or Ahankara (mind or ego) becomes a pure being." - H. H. Sri Sri Ravi
Shankar