Who said "Keep pushin' forward even when the road gets real tough."?

This quote is attributed to Mickey Mouse.

Keep pushin' forward even when the road gets real tough. - Mickey Mouse

"Keep pushin' forward even when the road gets real tough."

Mickey Mouse Perseverance

"Hot dog!"

"Oh boy!"

"Gosh!"

"That's swell!"

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."