SRI YUKTESWAR GIRI
Sri Yukteswar Giri (10 May 1855 – 9 March 1936) was a Kriya yogi, a Jyotisha (Vedic astrologer), a scholar of the Bhagavad Gita and the Bible, an educator and an astronomer. He was a disciple of Lahiri Mahasaya of Varanasi and a member of the Giri branch of the swami order. Yogananda considered Sri Yukteswar as Jnanavatar, or "Incarnation of Wisdom".
In 1884, Sri Yukteswar met Lahiri Mahasaya, who became his Guru and initiated him into the path of Kriya Yoga. Sri Yukteswar spent a great deal of time in the next several years in the company of his guru, often visiting Lahiri Mahasaya in Benares. In 1894, while attending the Kumbha Mela in Allahabad, he met the Guru of Lahiri Mahasaya, Mahavatar Babaji, who asked Sri Yukteswar to write a book comparing Hindu scriptures and the Christian bible. Mahavatar Babaji also bestowed on Sri Yukteswar the title of 'Swami' at that meeting. Sri Yukteswar completed the requested book in 1894, naming it Kaivalya Darsanam, or The Holy Science.