Who said "Hope is what keeps us going."?

This quote is attributed to Droopy.

Hope is what keeps us going. - Droopy

"Hope is what keeps us going."

Droopy Hope

"I'm so happy."

"Hello, I'm so glad to see you."

"That makes me so sad."

"I'm afraid I have some bad news."

"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."