The Pursuit of Happyness--Classic lines

You got a dream, you gotta protect it.
     如果你有梦想，就要守护它。 gotta 美俚 (=have got to) 必须

You want something. Go get it！
     有了目标就要全力以赴。

Don't ever let somebody tell you, you can't do something, not even me.
      别让别人告诉你你成不了才，即使是我也不行。