Once a missionary came to a Sufi in Persia, as he desired a discussion to prove his point of view right about the Sufi teachings. The Sufi, in his silent, quiet attitude of rest, was sitting, with his two or three pupils by his side. And the missionary asked some questions. The mystic answered: "You are right." But the man went on to dispute and the Sufi said only: "That is quite true." Then he took another turn and put his question in an eloquent manner. The man was very disappointed as there was no opportunity for argument. The Sufi saw the truth in all. The truth is like a piano. The notes may be high or low, you may strike a 'C' or an 'E', but they are all notes.