Good Will Hunting(1997)

Some people can never believe in themselves, until someone believes in them.

Headstrong yet aimless, Will Hunting has a genius-level IQ but chooses to work as a janitor at MIT. When he secretly solves highly difficult graduate-level math problems, his talents are discovered by Professor Gerald Lambeau, who decides to help the misguided youth reach his potential. When Will is arrested for attacking a police officer, Professor Lambeau makes a deal to get leniency for him if he gets court-ordered therapy. Eventually, therapist Dr. Sean Maguire helps Will confront the demons that are holding him back.