Question: How can silence be so powerful?

Bhagavan: A realised one sends out waves of spiritual influence, which draw many people towards him. Yet he may sit in a cave and maintain complete silence. We may listen to lectures upon truth and come away with hardly any grasp of the subject, but to come into contact with a realised one, though he speaks nothing, will give much more grasp of the subject. He never needs to go out among the public. If necessary he can use others as instruments. 

The Guru is the bestower of silence who reveals the light of Self-knowledge that shines as the residual reality. Spoken words are of no use whatsoever if the eyes of the Guru meet the eyes of the disciple.........