If we may believe our logicians, man is distinguished from all other creatures by the faculty of laughter. He has a heart capable of mirth, and naturally disposed to it.
• Joseph Addison
Wit is educated insolence.
Humor is the only test of gravity, and gravity of humor; for a subject which will not bear raillery is suspicious, and a jest which will not bear serious examination is false wit.
To promote laughter without joining in it greatly heightens the effect.
• Honore de Balzac