The film is such an amazing film about friendship and mentorship. This is probably my favourite role of the late Robin Williams. His character is so insightful and imparts advice to the troubled Will, but it's advice that I think everyone can take away from the film. It's a heartwarming film about a man who doesn't realise his academic potential, and then is able to solve a hard maths equation just in passing by as the janitor. This skill is picked up on by a passing professor who then encourages him to use his talent, but Will must decide what is most important to him in his life.