[2] Even though his tenure with the newly formed Ramakrishna Mission was short-lived owing to his early death, he left an indelible mark in spiritual and philanthropic activities.

[4] When the master was ill and was kept in Shyampukur by his devotees, Niranajn quit his job to work as the gatekeeper of the house.

There he was fooled by actress Binodini Dasi who visited an ailing Ramakrishna in the disguise of a European gentleman.

Later when Ramakrishna was shifted to Cossipore garden house he continued with his role as a gatekeeper with utmost devotion and prevented at least two lay disciples of Ramakrishna from entering the premises when the master was critically ill, among them Ramachandra Dutta and Atul Ghosh, the brother of Girish Chandra Ghosh.

Niranjan, together with Shashi Maharaj (later Ramakrishnananda) preserved most of the relics in a separate urn and this they kept in the house of Balaram Bose, which was later removed to Belur Math.

Niranjan took his monastic vow along with other brother disciples in 1887 and came to stay permanently in the Baranagar Math, the first abode of the monks of the Ramakrishna order.

He went for a pilgrimage in November 1889 to Deoghar and stayed in Banshi Dutt's garden house, living on alms.

Niranjanananda, like his brother disciples, held the Sarada Devi in high esteem, calling her the holy mother.

He took Girish Chandra Ghosh to the holy mother in her native village of Jairambati when the latter was going through a period of depression.

[4] According to the memoirs of his associate Achalananda (Kedar Maharaj) and the accounts of other brother disciples, Niranjan was known for his simplicity, truthfulness, purity, fearlessness, steadiness (in any matter of principle) and renunciation.

He believed in Ramakrishna as the infinite god in human form, did not put much stress on rituals, and had faith in the doctrine of service.