Who said "I've made mistakes, but I always try to do better."?

This quote is attributed to Mr. Peanutbutter.

I've made mistakes, but I always try to do better. - Mr. Peanutbutter

"I've made mistakes, but I always try to do better."

Mr. Peanutbutter Truth

"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"

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."