Who said "The best thing for being sad is to do something."?

This quote is attributed to Richard Feynman.

The best thing for being sad is to do something. - Richard Feynman

"The best thing for being sad is to do something."

Richard Feynman

Theoretical Physicist American 1918–1988

"The first principle is that you must not fool yourself, and you are the easiest person to fool."

"What I cannot create, I do not understand."

"The pleasure of finding things out is the most important thing."

"You don't have to know everything to do something."