Rabindranath Tagore suggested studying Vivekananda's works to learn about India. Indian independence activist Subhas Chandra Bose regarded Vivekananda as his spiritual teacher. Mahatma Gandhi said that after reading the works of Vivekananda, his love for his nation became a thousand-fold. Vivekananda taught mathematics at the University of Calcutta from 1883 to 1885 before moving to Chicago to study law. He finished his studies in 1888 and started his own law practice. In 1893, he gave up law to organize a religious community called "Ramakrishna Mission". The mission has branches across India and the world. He inspired many people with his ideas on peace, harmony, and universal brotherhood. Some of these people also became monks or nuns and started new branches of the Ramakrishna Mission. One such monk is Sarada Devi who founded the order of Divine Light Missionaries. She was greatly influenced by Vivekananda and used to say that without him, she would not have been born into this world. Another disciple named Swami Vishwananda lives in USA. He is known for writing several books on yoga philosophy. Vivekananda advocated individual meditation and self-inquiry instead of worshiping idols. He believed that only through knowledge and self-realization can one find God.