Who said "Sometimes kindness is the most powerful weapon."?

This quote is attributed to Iron Fist.

Sometimes kindness is the most powerful weapon. - Iron Fist

"Sometimes kindness is the most powerful weapon."

Iron Fist Kindness

"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."

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."