Marcus Aurelius
Author: Marcus Aurelius
Publisher: Penguin Great Ideas (2005)

Whatever befalls, Nature has either prepared you to face it or she has not.  If something untoward happens which is within your powers of endurance, do not resent it, but bear it as she has enabled you to do.  Should it exceed those powers, still do not give way to resentment; for its victory over you will put an end to its own existence.  Remember, however, that in fact Nature has given you the ability to bear anything which your own judgement succeeds in declaring bearable and endurable by regarding it as a point of self-interest and duty to do so.