Knowledge of what is does not open the door directly to what should be.

It's not that I'm so smart; it's just that I stay with problems longer.

Information is not knowledge.

Every serious scientific worker is painfully conscious ... of being relegated to an ever-narrowing sphere of knowledge.

There comes a time when the mind takes a higher plane of knowledge but can never prove how it got there.

The difference between genius and stupidity is; genius has its limits.