Such prosperity as we have known it up to the present is the consequence of rapidly spending the planet's irreplaceable capital.

I wanted to change the world. But I have found that the only thing one can be sure of changing is oneself.

So the journey is over and I am back again where I started, richer by much experience and poorer by many unexploded certainties. For convictions and certainties are too often the concomitants of ignorance. Those who like to feel they are always right and who attached a high importance to their own opinions should stay at home. When one is traveling, convictions are mislaid as easily as spectacles; but unlike spectacles, they are not easily replaced.

Experience is not what happens to a man; it is what a man does with what happens to him. It is a gift for dealing with the accidents of existence, not the accidents themselves.

The investigation of nature is an infinite pasture-ground where all may graze, and where the more bite, the longer the grass grows, the sweeter is its flavor, and the more it nourishes.

The spiritual journey does not consist of arriving at a new destination where a person gains what he did not have, or becomes what he is not. It consists in the dissipation of one's own ignorance concerning oneself and life, and the gradual growth of that understanding which begins the spiritual awakening. The finding of God is a coming to one?s self.

There will be, in the next generation or so, a pharmacological method of making people love their servitude, and producing dictatorship without tears, so to speak, producing a kind of painless concentration camp for entire societies, so that people will in fact have their liberties taken away from them, but will rather enjoy it.