Raja-Yoga Preface Introductory The First Steps Prana The Psychic Prana The Control of Psychic Prana Pratyahara and Dharana Dhyana and Samadhi Raja-Yoga in brief Patanjali's Yoga Aphorisms Introduction Concentration: Its spiritual uses Concentration: Its practice Powers Independence Appendix Swami Vivekananda was born on 12th January 1863 and died on 4th July 1902. He was also known as Narendra Nath Datta. He was a firm advocate of Vendatta Philosophies and Yoga. He was a disciple of Guru Ramakrishna and founded Ramakrishna Math and the Ramakrishna Mission.