Maharishi Mahesh Yogi
He was born in Raipur, India. He graduated from Allahabad University in Uttar Pradesh, and began his career as a physicist. His physics work made him interested in the sound vibrations made by spoken syllables, and how those vibrations could change a person's body or consciousness. In time, he became a disciple of Swami Brahmananda Saraswati, who was called "Guru Dev". He later became the swami's secretary. He could not become the swami's , because of India's caste system, but he could become a guru on his own. Guru Dev gave him the name "Bal Brahmachari Mahesh". Later he adopted the name Maharishi ("great teacher"), while "yogi" was a name given to teachers of yoga.