Who said "No, I can't do this. I have to find my son."?

This quote is attributed to Marlin.

No, I can't do this. I have to find my son. - Marlin

"No, I can't do this. I have to find my son."

Marlin Courage

"I'm sorry, but I can't help you. It's not you, it's me. Well, actually it is you."

"I promised I'd never let anything happen to him."

"He's my son."

"I have to find him. I have to find Nemo."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."