Nationalism is an infantile disease. It is the measles of mankind.

My scientific work is motivated by an irresistible longing to understand the secrets of nature not by other feelings.

At present every coachman and every waiter argues about whether or not the relativity theory is correct.

One had to cram all this stuff into one's mind for the examinations, whether one liked it or not. This coercion had such a deterring effect on me that, after I had passed the final examination, I found the consideration of any scientific problems distasteful to me for an entire year.

We are boxed in by the boundary conditions of our thinking

My internal and external life depend so much on the work of others that I must make an extreme effort to give as much as I receive.

Since that deluge of newspaper articles I have been so flooded with questions, invitations, suggestions, that I keep dreaming I am roasting in Hell, and the mailman is the devil eternally yelling at me, showering me with more bundles of letters at my head because I have not answered the old ones.