Who said "Change is not coming; it has already begun."?

This quote is attributed to The Night King.

Change is not coming; it has already begun. - The Night King

"Change is not coming; it has already begun."

The Night King Change

"The living are not my concern."

"Death is the enemy. And we are joining the fight against it."

"Winter came for House Umber."

"I am the night."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."