One funny but also thought-provoking quote is, "People who think they know everything are a great annoyance to those of us who do," by the late biochemistry professor Isaac Asimov. A quote about being happy is the Chinese proverb, "One joy scatters a hundred griefs." The Asimov quote humorously highlights the struggles of well-informed individuals who have to put up with ignorant people who think they know more than they actually do.
Johnny Carson made a humorous statement about happiness when he said that happiness is what patients experience after a dentist tells them a procedure does not hurt, only for the dentist to get his hand caught in the drill. Another quote about happiness is, "The foolish man seeks happiness in the distance. The wise grows it under his feet." James Oppenheim said this quote, implying that wise people realize the key to happiness is to take steps to achieve it wherever they are in life at the moment, while foolish people believe they can only be happy in the future.
Oliver Herford once poked fun at gender stereotypes by saying that women have cleaner minds than men because they change their minds more often. A quote that highlights Abraham Lincoln's sense of humor is, "If I had two faces, would I be wearing this one?" He stated this after someone called him two-faced.