Om

An anecdote about Ramana from the book "Ramana Maharishi and the path of Self-Knowledge" by Arthur Osborne:

A chinese visitor once wanted an autographed book about Ramana. Maharishi, as was his usual stand, refused to sign as he did not want to identify with a form and name. After being relentlessly and courteously pleaded with, he signed the book as OM!

A tingling sensation went up my spine as I was reading it!