Self-Realization Fellowship (SRF) is a worldwide spiritual organization founded by Paramahansa Yogananda in 1920 and legally incorporated as a non-profit religious organization in 1935, to serve as Yogananda’s instrument for the preservation and worldwide dissemination of his writings and teachings, including Kriya Yoga. Yogananda wrote in God Talks With Arjuna: The Bhagavad Gita that the science of Kriya Yoga was given to Manu, the original Adam, and through him to Janaka and other royal sages.