Swami Sivananda was a prominent Indian yogi and spiritual teacher, born on September 8, 1887, in Pattamadai, Tamil Nadu. He founded the Divine Life Society in 1936, which aimed to promote yoga, meditation, and spiritual knowledge. Sivananda emphasized the importance of selfless service, devotion, and the practice of Hatha Yoga and Raja Yoga. He authored over 200 books on spirituality, yoga, and health, making complex concepts accessible to a wide audience. Sivananda's teachings continue to inspire many around the world, and his legacy is carried on through various yoga schools and organizations that follow his principles.