Who said "The secret source of humor is not joy but sorrow."?

This quote is attributed to William James.

The secret source of humor is not joy but sorrow. - William James

"The secret source of humor is not joy but sorrow."

William James Humor

Psychologist, Philosopher American 1842–1910

"The greatest discovery of my generation is that human beings can alter their lives by altering their attitudes of mind."

"Act as if what you do makes a difference. It does."

"The only way out is through."

"Does consciousness exist? I say yes."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."