It has happened to me "more than once" that first everything bored me, then repulsed me, then nauseated me, so that I demanded only one thing: away, away from here! But in the end I found it better to remain "here" to bite down hard and swallow it down. I have managed this with a certain virtuosity, because for my whole life, first at home and then "in foreign parts", I was always alone deep down, so alone that I even learned not to wallow in "self-pity". Instead I learned to develop a mask of good humor, of irony and sarcasm, the armor of self-defense. The only thing that everyone sees of me.
Letter to a friend, 1942