A comprehensive sourcebook for the study and practice of Patanjali's yoga sutras, yoga philosophy's consummate classic text, by one of its most inspiring modern teachers. Extensive cross-referencing, a sutras-by-subject index, section by section previews and reviews, study guide for teachers and students, a word-for-word sutra dictionary, Sanskrit glossary, and down-to-earth hints for daily practice. A unique, must-have treasure for spiritual seekers from beginner to advanced.