Shiv Bhajanas are a collective form of shlokas that are sung on festive occasions. The singing of bhajans helps in healing the body and has a positive effect on the mind, heart and soul. When a devotee sings a bhajan, he starts identifying himself with Shiva. For many devotees, singing a bhajan will evoke a trance like state in which the he or she feels a strong bond or connection with god. The structure of Shiva Bhajanas allows one to generate, send and receive positive transformative energy. By singing a bhajana with a pure and sincere heart a devotee shall find her/himself transformed. It is believed by many that singing bhajans is one of the paths to moksha.
Once, before going into deep meditation, Lord Shiva appointed Nandi to guard the entrance to his abode so that no one would disturb him. Soon after Shiva had started his meditations, the great Sage Patanjali came to seek Lord Shiva’s blessings. Following his orders to the point, Nandi the bull, refused to let Patanjali meet with Shiva. Desperate to have an audience with the great god Shiva, Patanjali decided to compose a bhajan to please him. Mustering all his grammatical knowledge he composed a prayer on the spot. So perfect was the prayer, so melodious the tune that Shiva actually danced; and so pleasing were its words, that lord Shiva immediately bestowed his blessings on Patanjali. This incident took place in Chidambaram which is located near Chennai.
The Shiv Bhajana that Patanjali wrote is considered one of the most sacred. It is said that one who learns it and recites it daily with pure devotion will find a seat in the assembly of the Gods when s/he would depart from this life, for Lord Shiva takes care of all the needs of his devotees. Anyone who recites this hymn will quickly reach the highest goal in life- a union with transcendental powers while living in the mortal world. The Nataraj bhajan describes Shiva as being a god who has no origin and no end.