In my experience, the best creative work is never done when one is unhappy.
Dr. Einstein: Yes; But this year the answers are different.
My life is a simple thing that would interest no one. It is a known fact that I was born, and that is all that is necessary.
If only I had known, I should have become a watchmaker.
If you want to know the future, look at the past.
Every serious scientific worker is painfully conscious of this involuntary relegation to an ever-narrowing sphere of knowledge, which threatens to deprive the investigator of his broad horizon and degrades him to the level of a mechanic.