Who said "You've got to keep moving forward, even when it's hard."?

This quote is attributed to Mr. Peanutbutter.

You've got to keep moving forward, even when it's hard. - Mr. Peanutbutter

"You've got to keep moving forward, even when it's hard."

Mr. Peanutbutter Perseverance

"I'm just a simple dog trying to make it in Hollywood"

"Every time it seems like things are going great, something comes along and ruins it"

"You know what the key to happiness is? Not thinking about sad stuff"

"I'm an optimist. That's my thing"

"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."