Srila Bhaktisiddhanta Sarasvati Thakura, the spiritual master of Srila A.C. Bhaktivedanta Swami Prabhupada, appeared in Jagannatha Puri on 6 February 1874 as the son of Srila Sacidananda Bhaktivinoda Thakura. In his childhood, he quickly mastered the Vedas, memorized the Bhdgavad-gita, and relished his father’s philosophical works. He became known as “The Living Encyclopedia” for his extensive knowledge.

He preached convincingly against casteism and philosophical deviations from Gaudiya Vaisnavism. He tried to unite the four Vaisnava sampradayas by publishing their teachings. Srila Sarasvati Thakura earned the title Nrisimha Guru for his fearless and powerful delivery of the Vaisnava siddhanta. Mayavadis would cross the street to avoid confronting the “lion guru.” Besides being a courageous preacher, he was ornamented with all divine qualities and full of ecstatic love of God. He established 64 Gaudiya Math temples in India and centers in Burma, England, Germany.

Srila Sarasvati Thakura excavated Lord Caitanya’s appearance place at the Yogapitha in Sridhama Mayapur, despite heavy opposition from the money-hungry caste Goswamis of Navadvipa. He built a beautiful Gaudiya Math temple there.

The world was amazed to see the supernatural power of Sarasvati Goswami. Many educated persons from highly respectable families were attracted to him and thus dedicated themselves to the service of Lord Gauranga. Between 1918 and 1937 Bhaktisiddhanta Sarasvati founded sixty-four suddha bhakti Mathas at the following places: Navadvipa, Mayapura, Calcutta, Chaka, Mymensingh, Naryanaganj, Chittagong, Midnapore, Remuna, Balasore, Puri, Alalanatha, Madras, Covoor, Delhi, Patna, Gaya, Lucknow, Varanasi, Hardwar, Allahabad, Mathura, Vrindavana, Assam, Kuruksetra, and outside India in London, and Rangoon. Sarasvati Goswami instituted Gaurapadapitha at Nrsimhacala on the top of the Mandara hill, and at several places in South India. He initiated twenty five highly educated persons into Bhagavata Tridandi sannyasa.

A few days before his disappearance Bhaktisiddhanta Sarasvati called his foremost disciples and showered his blessings upon all his Devotees. He gave them the following instructions: “With the utmost enthusiasm preach the message of Rupa Raghunatha. Our ultimate goal is to become a speck of dust touching the lotus feet of the followers of Rupa Goswami. All of you remain united in allegiance to the spiritual master (asraya-vigraha) in order to satisfy the senses of the Transcendental Entity of Non-Dual Knowledge. Do not give up the worship of Hari even amidst hundreds of dangers, hundreds of insults or hundreds of persecutions. Do not become unenthusiastic upon seeing that the majority of people in this world are not accepting the message of Krishna’s sincere worship. Never give up the glorification of the topics of Krishna, they are your own personal bhajana and your very all and all. Being humble like a blade of grass and tolerant like a tree, constantly glorify Hari.”

In the early hours of the day on January 1, 1937 Bhaktisiddhanta Sarasvati Goswami passed away.

Reference:
https://gaudiyahistory.iskcondesiretree.com/sri-bhaktisiddhanta-sarasvati-thakura/
https://gaudiyahistory.iskcondesiretree.com/bhaktisiddhanta-sarasvati-thakura-2/