Man's will, sustained by an indominable conviction, is much more powerful than material forces that seem insurmountable.

I owe as much of my success to an uncompromising obstinacy as to any original ideas.

I should very much like to remain in the darkness of not having been analyzed.

It gives me great pleasure indeed to see the stubbornness of an incorrigible nonconformist warmly acclaimed.

We can understand almost anything, but we can't understand how we understand.

I was originally supposed to become an engineer but the thought of having to expend my creative energy on things that make practical everyday life even more refined, with a loathsome capital gain as the goal, was unbearable to me.

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.