Who said "Change is the only constant in this world"?

This quote is attributed to Abu.

Change is the only constant in this world - Abu

"Change is the only constant in this world"

Abu Change

"Ooh ooh! Ooh ooh!"

"Abu wants the shiny thing!"

"No, no, no - that one's mine!"

"Monkey see, monkey do!"

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."