I have become an obstinate heretic in the eyes of my colleagues. Momentary success carries more power of conviction than reflections upon principles.

Democracy, taken in its narrower, purely political, sense, suffers from the fact that those in economic and political power possess the means for molding public opinion to serve their own class interests. The democratic form of government in itself does not automatically solve problems; it offers, however, a useful framework for their solution. Everything depends ultimately on the political and moral qualities of the citizenry.

The gift of fantasy has meant more to me than my talent for absorbing positive knowledge.

the contemplation of this world beckoned like a liberation

Concern for man and his fate must always form the chief interest of all technical endeavors. Never forget this in the midst of your diagrams and equations.

This is a question too difficult for a mathematician. It should be asked of a philosopher"(when asked about completing his income tax form)

It is humankind's duty to respect all life, not only animals have feelings but even also trees and plants.