Ramana Maharshi was an Indian sage from South India who lived during the early 20th century.
Ramana Maharshi was not a guru in the classic sense of a teacher who gives instruction on a regular basis or gives mantras during initiation. In fact, if the seeker wanted to practice repetition of a mantra rather than the "who am I?" method of self inquiry, he recommended repeating the pronoun "I" or the phrase "I am" rather than repeating sacred Sanskrit words or the names of gods. This focused the person's mind on "being itself" or the mystery of their own awareness rather than an external object or word.