The possibility of killing one's self is a safety valve. Having it, man has no right to say life is unbearable.
Leo TolstoyDarkness had fallen upon everything for him; but just because of this darkness he felt that the one guiding clue in the darkness was his work, and he clutched it and clung to it with all his strength.
Leo TolstoyProgress consists only in the greater clarification of answers to the basic questions of life.
Leo Tolstoy