An expert is a person who has few new ideas; a beginner is a person with many.
A perfection of means, and confusion of aims, seems to be our main problem.
Only the one who does not question is safe from making a mistake.
It has become appallingly obvious that our technology has exceeded our humanity.
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.
All the fifty years of conscious brooding have brought me no closer to answer the question, "What are light quanta?" Of course today every rascal thinks he knows the answer, but he is deluding himself.