Smile; you don't own all the problems of the world.

From “Lincoln 365,” by Arnold Kunst:
April 23
'How many legs does a dog have if you count the tail a leg? Four. Caunting a tail a leg doesn't make it a leg.' 
- Abraham Lincoln

‘Squeeze an orange and what comes out is orange juice – no matter what does the squeezing the thing that comes out is what was inside already. If you get angry because someone says or does something, what comes out is, like the orange juice, what was inside already. Give your attention to the content; it is far more important than the source of the squeeze.’
- Arnold Kunst