When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.

My intellectual development was retarded, as a result of which I began to wonder about space and time only when I had already grown up.

One strength of the communist system of the East is that it has some of the character of a religion and inspires the emotions of a religion.

Persistence is the most powerful force on earth, it can move mountains.

The most important thing is to not stop questioning.

Hope that justice will be done to those brave men who stood up for their convictions.

Politics is for the present, but an equation is for eternity.