Who said "The only thing I know how to do is fight."?

This quote is attributed to Zoro.

The only thing I know how to do is fight. - Zoro

"The only thing I know how to do is fight."

Zoro Work

"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."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."