This has been done elegantly by Minkowski; but chalk is cheaper than grey matter, and we will do it as it comes.

When a man, after long years of searching, chances upon a thought which discloses something of the beauty of this mysterious universe, he should not therefore be personally celebrated. He is already sufficiently paid by his experience of seeking and finding.

The same thinking and actions that created our problems cannot be used to solve them.

The Bible is a great source of wisdom and consolation and should be read frequently.

The trouble with the younger generation is that they don't stay young for very long.

If we knew what it was we were doing, it would not be called research, would it?

Show me a satisfied man, and I'll show you a failure.