It is impossible that a genius - at least a literary genius - can ever be discovered by his intimates; they are so close to him that he is out of focus to them and they can't get at his proportions; they can't perceive that there is any considerable difference between his bulk and their own.
The difference between physics and metaphysics is not that the practitioners of one are smarter than the practitioners of the other. The difference is that the metaphysicist has no laboratory.
A theory is the more impressive the greater the simplicity of its premises is, the more different kinds of things it relates, and the more extended is its area of applicability. Therefore the deep impression which classical thermodynamics made upon me. It is the only physical theory of universal content concerning which I am convinced that within the framework of the applicability of its basic concepts, it will never be overthrown.
In the history of the human race, those periods which later appeared as great have been the periods when the men and the women belonging to them had transcended the differences that divided them and had recognized in their membership in the human race a common bond.
Because of the great differences in our ways of thinking, it is inevitable that we have different religions and faiths. Each has its own beauty. And it is much better that we live together on the basis of mutual respect and mutual admiration.