Being brought up in North India, Sharat Chandra developed proficiency in the Hindi and Urdu languages, although his mother tongue was Bengali.

Sometime in September 1888 Swami Vivekananda, then an unknown itinerant monk, was travelling from Vrindavan to Haridwar and decided to take a train from Hathras.

While he was waiting for the train, the station master of Hathras, Sharat Chandra Gupta, took notice of him and invited him to his quarters.

[6] When Swami Vivekananda had asked Sharat as to what he had to offer as food to the guest, the latter replied quoting from a Persian poem, "Oh Beloved, you have come to my house, I shall prepare the most delicious dish for you with the flesh of my heart.

The journey was strenuous for Sharat Chandra and at one point Swami Vivekananda carried his belongings, including his heavy boots, which Sadananda remembered throughout his life.

[8] During his stay in America, Swami Vivekananda enquired about Sadananda in some of his letters written to his brother disciples.

He also served an ailing Balaram Bose, the direct householder disciple of Sri Ramakrishna, when the latter was in his deathbed.

[4] In April 1890 Sadananda went to Benares and stayed with Swami Vivekananda in the garden house of Pramadadas Mitra, living a life of austere spiritual practices.

He also nursed back an ailing Swami Abhedananda and stayed with the latter in Jhusi, near Allahabad and studied and practised Vedanta under his tutelage.

However, Swami Saradananda helped him in overcoming his troubles with the language and the rigorous disciplines of a monastic life.

[15] According to the biographer of Sister Nivedita, this duty was entrusted upon Swami Sadananda because of his strict discipline resulting from his military background.

He was also instrumental in introducing Sister Nivedita to the general populace of Baghbazar and nearby areas, which facilitated her work and helped to gain the trust of the local people.

[16] Swami Vivekananda had entrusted him the responsibility of supervisor of the plague relief work, which started in March 1899 in Calcutta.

He started his life of service by serving the monks and brother disciples of Swami Vivekananda in Baranagar and Alambazar monastery.

Sadananda helped Nivedita in running Vivekananda Students' Home for a year and took the young boys to trips to the Himalayas.

In 1909, he stayed for sometime in the house of Sureswar Sen in Bishnupur, Bankura and inspired the family with the ideals of Sri Ramakrishna and Swami Vivekananda.

An article in Prabuddha Bharata was written as an obituary to him which stated, "There was no work so hard, no difficulty so insurmountable, no word of command so impracticable, that he could not carry into effect for the sake of Swami Vivekananda."

Swami Sadananda played an important role in the early history of the Ramakrishna movement through his twin ideals of service and renunciation.

[4] He also helped in shaping the ideals of Sister Nivedita and in her work to promote education among Indian women by familiarizing her with the traditional customs of India, by introducing her to the local people and by bringing the first three girls who joined her school.

[15] Sister Nivedita acknowledged in her letter to Sara Bull that Swami Sadananda was her greatest strength in her dealings with children of the school.

Even after Sister Nivedita formally relinquished her association with Ramakrishna Order owing to her political activities, Swami Sadananda remained to take care of her.