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

This quote is attributed to Arya Stark.

Change is the only constant in life. - Arya Stark

"Change is the only constant in life."

Arya Stark Change

"A girl has no name."

"The north remembers."

"Not today."

"What do we say to the god of death? Not today."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."