Nityanand Swami was born as Dinmani on Chaitra sud 9, VS 1849 (1793), in the pious Brahmin family of Vishnu Sharma and Virjadevi, in the town of Datiya (near Lucknow in UP). He went to Kashi (Benares) to study Sanskrit, but then traveled to Jagannath Puri, Rameshwar, and Dwarika in search of a Satpurush (great saint). Dinmani finally heard of Swaminarayan Bhagwan in Visnagar and met Him in Unza. Dinmani was soon initiated in Meghpur by Swaminarayan Bhagwan as Nityanand Swami.
On the basis of Vedic scriptures, Nityanand Swami upheld the new Swaminarayan movement. And when a section on upaasanaa in the scripture Satsangijivan (highlighting the life of Swaminarayan Bhagwan) was to be written, Nityanand Swami insisted that Swaminarayan Bhagwan be described as the supreme God. Swaminarayan Bhagwan excommunicated him, but for seven days Nityanand Swami remained steadfast in his belief. Finally, Swaminarayan Bhagwan called Nityanand Swami back and garlanded him for his understanding (ref. Swami Ni Vato 5/149, 5/205, 5/290, 6/33, 11/75, and 11/87). Nityanand Swami was one of the compilers of the Vachanamrut and wrote many scriptures. He supported Gunatitanand Swami (coming to Junagadh regularly) and the Acharyas (especially to preserve Swaminarayan Bhagwan's prasaadi items, and to construct a temple in Lakshmi Vadi). After serving the divine fellowship for 54 years, Nityanand Swami left his mortal body on November 26, 1846 (Maghshar sud 8, VS 1903). Gopalanand Swami and Nityanand Swami's memorial site is in today's Gnyan Bhag in Vadtal.