Mathematics is the key to unlocking the secrets of the universe and understanding the fundamental laws that govern it.

The most profound truths are often the ones we overlook.

The most necessary, the most important, the principal, the most essential thing for a musician is this: to know what he wants, what he can do, and what he ought to do.

Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.

"The truth of fiction lies not in its facts but in its emotional honesty."