Therefore do not be anxious about tomorrow, for tomorrow will be anxious for itself. Let the day's own trouble be sufficient for the day. (Matthew 6:34) Bible
One's own escape from troubles makes one glad; but bringing friends to trouble is hard grief. Sophocles
It is a painful thing to look at your own trouble and know that you yourself and no one else has made Sophocles
To be unable to bear an ill is itself a great ill. Bion
Learn to see in another's calamity the ills which you should avoid. Publilius Syrus
If you can't stand the heat, get out of the kitchen. Harry Truman
Pain is inevitable, suffering is optional. Unknown
Humanity either makes, or breeds, or tolerates all its afflictions. Herbert George Wells