When I feel well and in a good humour, or when I am taking a drive or walking after a good meal, or in the night when I cannot sleep, thoughts crowd into my mind as easily as you could wish.
—Wolfgang Amadeus Mozart
A sense of humour is the only divine quality of man.
—Arthur Schopenhauer
There is nothing in the world so irresistibly contagious as laughter and good humor.
—Charles Dickens
The secret to humor is surprise.
—Aristotle