The School of Rock (2003) is a comedy directed by Richard Linklater about Dewey Finn (Jack Black), a lazy, self-centered, amateur musician who impersonates a teacher, Ned Schneebly (Mike White), and enlists his students to compete in a Battle of the Bands.
Do what you love because you love it. Even if you are not very good at it, you can find a way to fit it into your life.
Dewey: “Look, I’m sorry, dude. I was desperate. You can’t understand. It was easy for you to give up music. It ain’t easy for me.”
Ned: “It wasn’t easy for me. I miss it.”
Dewey: “Well, then why’d you give it up?”
Ned: “Because I couldn’t keep kidding myself anymore. You can blame it all on bad luck, but in the end, maybe we just weren’t that good. Sometimes you gotta know when to quit.”
Dewey: “ …Well, music is my life man.”