The Holy Science was written by Sri Yukteswar at the behest of Mahavatar Babaji. In it, Sri Yukteswar compares Sanskrit slokas to the writings of the New Testament. Also explained is the great cycle of world ages (yugas). Yukteshwar was an educator, astronomer, a Jyotisha (Vedic astrologer), a yogi, and a believer in the Bhagavad Gita and the Bible. He was a disciple of Lahiri Mahasaya of Varanasi and a member of the Giri branch of the swami order.