Who said "Life is too short to spend it being grumpy. Though I'll try."?

This quote is attributed to Snoopy.

Life is too short to spend it being grumpy. Though I'll try. - Snoopy

"Life is too short to spend it being grumpy. Though I'll try."

Snoopy Humor

"I think I'm dying. Send for a doctor immediately!"

"Rats! Another day, another disappointment."

"Sometimes I lie awake at night and ask, 'Is life a multiple choice test or an essay?' Then a dog barks and I realize it doesn't matter."

"I love mankind. It's people I can't stand."

"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."