Who said "I can do this. I can do this."?

This quote is attributed to Finn.

I can do this. I can do this. - Finn

"I can do this. I can do this."

Finn Courage

"I'm not who you think I am."

"I can't keep running. I have to stand and fight."

"We're not alone. Good people will help us."

"I've been wondering about my past my whole life."

"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."