Who said "The real power is inside you."?

This quote is attributed to Po.

The real power is inside you. - Po

"The real power is inside you."

Po Strength

"I'm not a big fan of jokes"

"There is no secret ingredient. It's just you."

"You just have to believe"

"I'm the Dragon Warrior!"

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."