The present moment is never intolerable. It is always what is coming in five minutes or five days that makes people despair. The Law of Life is to live in the present, and this applies to both time and place. Keep your attention to the present moment, and in the place where your body is now. Do a fair day's work, and then stop. Overwork is not productive in the long run.

Make your life worth while (ed. Harper San Francisco, 1946)