This is a great clip from one of my favorite actors, Kevin Spacey, talking about the difference between ambition versus knowing WHY you want to achieve something.
To know what you want, to understand why you’re doing it, to dedicate every breath in your body, to achieve… If you feel that you have something to give, if you feel that your particular talent is worth developing, is worth caring for, then there’s nothing you can’t achieve. – Kevin Spacey