Swami Vivekananda was a Hindu monk, spiritual leader, and disciple of Ramakrishna who introduced the teachings of Vedanta and Yoga to a global audience. Among his most devoted disciples was Sister Nivedita, who later wrote Kali the Mother. Known for his inspiring speeches and dynamic leadership, he emphasized the unity of all religions and the divine potential within every person. He taught that spiritual growth comes through self-discipline, selfless service, devotion, and the pursuit of knowledge. His lectures and writings helped bridge Eastern and Western thought. To learn more, read Raja Yoga.