Who said "The way of the warrior requires sacrifice."?

This quote is attributed to Iron Fist.

The way of the warrior requires sacrifice. - Iron Fist

"The way of the warrior requires sacrifice."

Iron Fist Perseverance

"I am the living weapon. I am Iron Fist."

"I've trained my entire life for this moment."

"The chi flows through all living things."

"I need to protect the innocent."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."