Who said "The pain of training is the price of becoming strong."?

This quote is attributed to Zoro.

The pain of training is the price of becoming strong. - Zoro

"The pain of training is the price of becoming strong."

Zoro Perseverance

"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."

"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."