Who said "Laugh or cry? Funny or sad? It's all in how you look at things."?

This quote is attributed to Billy Pilgrim.

Laugh or cry? Funny or sad? It's all in how you look at thin... - Billy Pilgrim

"Laugh or cry? Funny or sad? It's all in how you look at things."

Billy Pilgrim Humor

Character in Slaughterhouse-Five

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"Everything is supposed to be very hush-hush"

"How nice – to feel nothing, and still get full credit for being alive"

"The most important thing I learned on Tralfamadore was that when a person dies he only appears to die"

"War has ways of keeping you busy"

"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."