The Brass figure of Patanjali is nicely treated with minute detail. Patanjali, the great yoga guru is also believed to be an incarnation of Adishesa, the first ego-expansion of Lord Vishnu. His primeval energies and opulence, is part of the so-called catur vyūha, the fourfold manifestation of Vishnu. Thus Patañjali may also be considered one incarnation of God defending the ego of yoga. Patanjali is the compiler of the Yoga Sutras, a major work containing articles on the philosophical aspects of mind and consciousness. He is also the author of a major commentary on Panini's Ashtadhyayi. "Yoga" in traditional Hinduism involves inner contemplation, a rigorous system of meditation practice, ethics, metaphysics, and devotion to the one common soul, God, or Brahman. He was also a great Natya dancer and is revered by the exponents of classical Indian dance as their patron saint.