“ The Holy Science "
Yukteshwar born as Priyanath, 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. Sri Yukteshwar Giri is the monastic name of Priyanath Karar, the guru of Satyananda Giri and Paramahansa Yogananda.
In 1884, Priyanath 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 SriYukteswar 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 Yukteswarcompleted the requested book in 1894, naming it Kaivalya Darsanam, or The Holy Science. The work introduced many ideas that were revolutionary for the time — for instance Sri Yukteswar broke from Hindu tradition in stating that the earth is not in the age of Kali Yuga, but has advanced to Dwapara Yuga. His proof was based on a new perspective of the precession of the equinoxes. He also introduced the idea that the sun takes a ‘star for its dual’, and revolves around it in a period of 24,000 years, which accounts for the precession of the equinox.
Sri Yukteswar was especially skilled in Jyotisha (Indian astrology), and prescribed various astrological gemstones and bangles to his students. He also studied astronomy and science, as evidenced in the formulation of his Yuga theory in The Holy Science. One of the greatest expounders of the Bhagavad Gita, Swami Maharaj was a great disciple of Yogiraj Sri Shyama Charan Lahiri Mahasaya of Benares. He was the founder of several Yogoda Sat-Sanga (Self-Realization Fellowship) centers in India, and was the great inspiration behind the yoga movement which was carried to the West by Swami Yogananda, his principal disciple.
Sri Yukteswar converted his large two-story family home in Serampore into an ashram, named "Priyadham", where he resided with students and disciples. In 1903, he also established an ashram in the seaside town of Puri, naming it "Kararashram". From these two ashrams, Sri Yukteswar taught students, and began an organization named "Sadhu Sabha". An interest in education resulted in Sri Yukteswar developing a syllabus for schools, on the subjects of physics, physiology, geography, astronomy, and astrology. He also wrote a book for Bengalis on learning basic English and Hindi called "First Book", and wrote a basic book on astrology. Later, he became interested in the education of women, which was uncommon in Bengal at that time.