pratyahara, in the Yoga system of Indian philosophy, the fifth of the eight stages intended to lead the aspirant to samadhi, the state of perfect concentration. The goal of pratyahara is to arrest the reaction of the senses to external objects, thus helping to isolate and free the mind from the involuntary intrusions caused by sensory activity. The mind does not cease to experience external phenomena but merely experiences them directly through its own intensified powers of concentration instead of through the mediation of the senses.