Scientific knowledge is a body of statements of varying degrees of certainty -- some most unsure, some nearly sure, none absolutely certain.

One does not, by knowing all the physical laws as we know them today, immediately obtain an understanding of anything much. I love only nature, and I hate mathematicians.

The first principle is that you must not fool yourself and you are the easiest person to fool.

A great deal more is known than has been proved.

You have no responsibility to live up to what other people think you ought to accomplish. I have no responsibility to be like they expect me to be. It's their mistake, not my failing.

The world is a dynamic mess of jiggling things

God was invented to explain mystery. God is always invented to explain those things that you do not understand.