Who said "The best battles are the ones fought against yourself."?

This quote is attributed to Mushu.

The best battles are the ones fought against yourself. - Mushu

"The best battles are the ones fought against yourself."

Mushu Perseverance

"I'm gonna help you become a man. You'll need all the help you can get."

"Now, when I say 'giddy up,' you giddy up, okay?"

"You've got to take a whole new approach. I'm thinking... how about this? Curl up like a ball!"

"You're a man now. You can do things that I can't."

"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."