Physics is an attempt conceptually to grasp reality as something that is considered to be independent of its being observed. In this sense one speaks of physical reality.

Heroism on command, senseless violence, and all the loathsome nonsense that goes by the name of patriotism - how passionately I hate them!

If at first the idea is not absurd, then there is no hope for it.

We still do not know one thousandth of one percent of what nature has revealed to us.

I have only two rules which I regard as principles of conduct. The first is: Have no rules. The second is: Be independent of the opinion of others.

How do I work? I grope.

For me the Jewish religion like all other religions is an incarnation of the most childish superstitions.