Who said "I have to do this alone."?

This quote is attributed to Simba.

I have to do this alone. - Simba

"I have to do this alone."

Simba

"Remember who you are. You are my son and the one true king."

"The past can hurt, but you can run from it or learn from it."

"I will try to be brave like my father before me."

"Being brave doesn't mean you're not scared. It means you do what's right anyway."