Mahavatar Babaji is the Supreme Guru in the line of the Masters of Self-Realization Fellowship and the Yogoda Satsanga Society of India.
In 1920 Babaji told Paramahansa Yogananada, "You are the one I have chosen to spread the message of Kriya Yoga in the West...the scientific technique of God-Realization will ultimately spread in all lands, and aid in the harmonizing the nations through man's personal, transcendental perception of the Infinite father."
The teachings of Self-Realization Fellowship/Yogoda Satsanga Society of India are founded upon the original Christianity of Jesus Christ and the original Yoga of Bhagavan Krishna. The spiritual lineage of SRF/YSS consists of these two great avatars and a line of exalted masters of contemporary times: Mahavatar Babaji, Lahiri Mahasaya, Swami Sri Yukteswar, and Paramahansa Yogananda (last in the line of SRF/YSS Gurus).
Each of these Great Ones played a role in Self-Realization Fellowship's mission of bringing to the modern world the spiritual science of Kriya Yoga.