So you see, the quality of humor is not a personal or a national monopoly. It's as free as salvation, and, I am afraid, far more widely distributed. But it has its value, I think. The hard and sordid things of life are too hard and too sordid and too cruel for us to know and touch them year after year without some mitigating influence, some kindly veil to draw over them, from time to time, to blur the craggy outlines, and make the thorns less sharp and the cruelties less malignant.
Mark TwainWhat is it that strikes a spark of humor from a man? It is the effort to throw off, to fight back the burden of grief that is laid on each one of us. In youth we don't feel it, but as we grow to manhood we find the burden on our shoulders. Humor? It is nature's effort to harmonize conditions. The further the pendulum swings out over woe the further it is bound to swing back over mirth.
Mark Twain