Who said "This is insane. I can't do this."?

This quote is attributed to Marlin.

This is insane. I can't do this. - Marlin

"This is insane. I can't do this."

Marlin Fear

"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."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."