|In Hinduism, sadhu, or shadhu is a common term for a mystic, an ascetic, practitioner of yoga (yogi) and/or wandering monks. The sadhu is solely dedicated to achieving the fourth and final Hindu goal of life, moksha (liberation), through meditation and contemplation of Brahman. Sadhus often wear ochre-colored clothing, symbolizing renunciation.
An important symbol of this renuciation occasionally involves overcoming the physical body. Seated on a bed of nails, as seen here, is one method employed.