Patanjali's Yoga Sutra outlines the classical yoga philosophy and practice. It defines yoga as the cessation of mind fluctuations through disciplined practice and detachment. The text describes the eight limbs of ashtanga yoga - yama, niyama, asana, pranayama, pratyahara, dharana, dhyana, samadhi - which when practiced lead to stillness of body and mind, control of senses, one-pointed concentration, absorption and ultimately liberation of the true self from identification with mind and body. The goal of yoga is to realize the seer's true nature by disentangling consciousness from matter through yoga's transformative practices.