There is no defense against adverse fortune which is so effectual as an habitual sense of humor.
HUMOR, DEFENSE AGAINST ADVERSE FORTUNE
It's good to be able to laugh at yourself and the problems you face in life. Sense of humor can save you.
When you say a friend has a sense of humor do you mean that he makes you laugh, or that he can make you laugh?
In truth, politeness is artificial good humor, it covers the natural want of it, and ends by rendering habitual a substitute nearly equivalent to the real virtue.
HUMOR, POLITENESS IS ARTIFICIAL GOOD HUMOR
A person without a sense of humor is like a wagon without springs. It's jolted by every pebble on the road.