Who said "I've learned that sadness is only a temporary setback."?

This quote is attributed to SpongeBob SquarePants.

I've learned that sadness is only a temporary setback. - SpongeBob SquarePants

"I've learned that sadness is only a temporary setback."

SpongeBob SquarePants Hope

"I'm ready!"

"Ahahaha! I love you."

"The best time to wear a striped sweater is all the time."

"I'm a goofy goober, yeah!"

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."