When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.

I learned from her that every woman is worried about her looks, no matter how beautiful she is.

It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible.

What Do You Care What Other People Think?

A great deal more is known than has been proved.

What we need is imagination, but imagination in a terrible strait-jacket.

Experiment is the sole judge of the validity of any idea.