From the movie The Pursuit of Happiness

Child Puts shoots a basketball through the hoop and then exclaims ” I am going to be a pro!”

  Father – “Well I don’t know about that, you will probably be as good as I was. That’s the way it works. I was below average so you will probably be around that. You excel at a lot of things, but not this so I don’t want you shooting this basketball day and night, alright?” Child is disappointed and puts the ball back in the bag. Father notices and says  – “Hey, Don’t ever let somebody tell you you can’t do something, not even me. Alright? You got a dream, you gotta protect it. People can’t do something themselves, they wanna tell you you can’t do it. If you want something, go get it. Period.”

From the movie The Pursuit of Happyness