Swami Vivekananda, a philosopher and spiritual leader, is celebrated in India on National Youth Day, January 12. Born Narendra Nath Datta, he gained global recognition for his 1893 speech at the World's Parliament of Religions, advocating humanitarianism. He founded the Ramakrishna Math and Mission, promoting Vedanta and Yoga globally. His teachings emphasize self-belief, resilience, and balancing intellect with empathy, encouraging followers to listen to their hearts.