Imagine the life of Abraham, of Moses, the life of Jesus Christ; and again the life of Mohammed in war and battles, and yet as exclusive and remote, as spiritual as anyone could be. And Krishna, picture him in Kurukshetra fighting in the battle, giving a world-scripture. If they had all lived in mountain caves we would not have been benefited by them. What is the use of those holy ones who never see, never experience from morning till evening the tests and trials of the dense world, where at every move there are a thousand temptations and difficulties, a thousand problems? What can they do, those who are outside the world, for us who are exposed to a thousand difficulties at every moment of our life? And these difficulties are increasing. With the evolution of the world life is becoming heavier, more difficult. No, the mastery, the holiness, the evolution must be shown here on earth. It is very easy to be evolved in the seventh heaven. But exaltation experienced and imparted to others here on the earth is exaltation which is more worth while.