Who said "Change is the only constant in life."?

This quote is attributed to Shifu.

Change is the only constant in life. - Shifu

"Change is the only constant in life."

Shifu Change

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

"When will you realize? The more you take, the less you have."

"Your story may not have such a happy beginning, but that does not make you who you are."

"It is said that the Dragon Warrior will bring peace to the Valley."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."