Who said "Strength comes not from the muscles, but from the heart."?

This quote is attributed to Zoro.

Strength comes not from the muscles, but from the heart. - Zoro

"Strength comes not from the muscles, but from the heart."

Zoro Strength

"I am not going to die. I'm going to keep fighting until I become the world's greatest swordsman!"

"Shitty glasses."

"I don't care what the world thinks. I'm going to be the world's greatest swordsman!"

"A swordsman's true path is one of solitude."

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."