Nobody doubts that he exists, though he may doubt the existence of God. If he finds out the truth about himself and discovers his own source, this is all that is required.
The seat of Realization is within and the seeker cannot find it as an object outside him. That seat is bliss and is the core of all beings. Hence it is called the Heart.
A realized one sends out waves of spiritual influence in his aura, which draw many people towards him. Yet he may sit in a cave and maintain complete silence.
