Who said "Your swords cannot pierce what has no true flesh."?

This quote is attributed to The Night King.

Your swords cannot pierce what has no true flesh. - The Night King

"Your swords cannot pierce what has no true flesh."

The Night King Courage

"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."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."