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

I don't believe one grows older. I think that what happens early on in life is that at a certain age one stands still and stagnates.

Tragedy is a tool for the living to gain wisdom, not a guide by which to live.

All models are wrong, but some are useful.

Life is either a daring adventure or nothing.

Riches come forth from one who owns little, while another of material wealth turns penniless.