In the Moana chapter book, after she and Maui escape Lalotai and he starts moping about how they’re never going to make it to Te Fiti, Moana actually gives him two motivational speeches!
There’s the one she gives him on their canoe, when he’s telling her his backstory. When she looks at him and tells him that he is worth more than his hook, that his past does not define him, that he is the one who makes him Maui.
But even before that, before they’ve even left Lalotai, she gives him a different one. She’s trying to encourage him to stand back up so they can get a move on (more or less), but he feels too defeated to keep going. She tells Maui that they will make it to Te Fiti, that he will defeat Te Ka.
And when he asks why?
She looks at him and she goes “Because you are Maui”
So, later, on Te Fiti
When Moana tries to apologize to him for what she did to his hook, and he says