Who said "Laughter in dark times is a sign of inner strength."?

This quote is attributed to Captain Jack Hanna.

Laughter in dark times is a sign of inner strength. - Captain Jack Hanna

"Laughter in dark times is a sign of inner strength."

Captain Jack Hanna Humor

"You're gonna need a bigger boat."

"Farewell and adieu to you fair Spanish ladies."

"I used to hate the water."

"Some men are coming to kill us and we're gonna kill them first."

"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."