I have always loved solitude, a trait which tends to increase with age.
The payment of the worker is not determined by the value of his product.
The faster you go, the shorter you are.
I don't teach my students, I provide the circumstances in which they can learn.
The ordinary adult never gives a thought to space-time problems ... I, on the contrary, developed so slowly that I did not begin to wonder about space and time until I was an adult. I then delved more deeply into the problem than any other adult or child would have done.
... it is a welcome symptom in an age which is commonly denounced as materialistic, that it makes heroes of men whose goals lie wholly in the intellectual and moral sphere.