He spent several years in his company in the solitude of Shyamla Tal in the Himalayas and also in Belurmath up to 30 May 1951.

Under his stewardship, the Math and Mission conducted massive relief and rehabilitation operations in various parts of India, Nepal and Bangladesh.

He became the General Secretary of the Math and Mission in 1992 and continued in that post until 1997, when he became a vice-president of the Order on 22 May 1997.

As a vice-president of the Math and Mission, he travelled extensively in various parts of the country and visited many branches of the Order and some unaffiliated centres.

In all those places, he spread the message of Ramakrishna, Sarada Devi, Vivekananda and Vedanta and also gave spiritual initiation (mantra diksha) to many seekers.

Inspired by the Teachings of Swami Vivekananda since his young days, Indian Prime Minister Narendra Modi wanted to join the mission to become a monk.

[4] Indian Prime Minister Narendra Modi expressed his condolence in a tweet saying: "The demise of Swami Atmasthananda ji is a personal loss for me.