Who said "I have to trust the training, even when it's hard."?

This quote is attributed to Iron Fist.

I have to trust the training, even when it's hard. - Iron Fist

"I have to trust the training, even when it's hard."

Iron Fist Faith

"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."

"Faith guides me through difficult times."

"Faith is believing when you can't see."

"You have to believe in something, or you'll fall for anything."

"Faith in God and in each other is what sustains us"