Every musician knows how difficult it is to keep his violin in tune, especially when it is shaken wherever he has to move in the crowd. The heart, therefore, is incomparably more susceptible to get out of tune. It is therefore that the seers and mystics sought solitude, and kept themselves away from the crowd; but the Prophet, by his natural mission, is placed in the midst of the crowd. It is the problem of life in the crowd which he has to solve, and yet not solve it intellectually, as everyone wishes to do, but spiritually, by keeping that instrument, the heart, in proper tune to the Infinite, that he may get the answer for all questions arising at every moment of the day.