A few other great quotes by him:

"Newspapers are unable, seemingly, to discriminate between a bicycle accident and the collapse of civilization." George Bernard Shaw, 1931

"Leisure is not idleness. It is not even a luxury. It is a necessity, and a necessity of the first importance. Some of the most valuable work done in the world has been done at leisure, and never paid for in cash or kind. Leisure does what it likes: labor does what it must." George Bernard Shaw, Socialism & Culture 1889

"Progress is impossible without change, and those who cannot change their minds cannot change anything."

"The power of accurate observation is commonly called cynicism by those who don't have it"

"Do you know what a pessimist is? A man who thinks everybody is as nasty as himself, and hates them for it."

"You don't stop laughing when you grow old.
You grow old when you stop laughing."