"Man," says Hazlitt, "is the only animal that laughs and weeps, for he is the only animal that is struck with the difference between what things are and what they ought to be." The sources, then, of laughter and tears come very close together. At the difference between things as they are and as they ought to be we laugh, or we weep; it would depend, it seems, on the point of view, or the temperament. And if, as Horace Walpole once said, "Life is a comedy to those who think, a tragedy to those who feel," it is the thinking half of humanity that, at the sight of life’s incongruities, is moved to laughter, the feeling half to tears. A sense of humor, then, is the possession of the thinking half, and the humorists must be classified at once with the thinkers.
If one were asked to go further than this and to give offhand a definition of humor, or of that elusive quality, a sense of humor, he might find himself confronted with a difficulty. Yet certain things about it would be patent at the outset: Women haven’t it; Englishmen haven’t it; it is the chiefest of the virtues, for tho a man speak with the tongues of men and of angels, if he have not humor we will have none of him. Women may continue to laugh over those innocent and innocuous incidents which they find amusing; may continue to write the most delightful of stories and essays—consider Jane Austen and our own Miss Repplier—over which appreciative readers may continue to chuckle; Englishmen may continue, as in the past to produce the most exquisite of the world’s humorous literature—think of Charles Lamb—yet the fundamental faith of mankind will remain unshaken: women have no sense of humor, and an Englishman cannot see a joke! And the ability to "see a joke" is the infallible American test of the sense of humor.