When you make a business, you get to make a little universe where you control all the laws.

It's only a little difficult to say no. You've got to believe that the work you're doing is ultimately more useful to the world.

Success comes from persistently improving and inventing, not from persistently promoting what’s not working.

The most brilliant idea, with no execution, is worth $20. The most brilliant idea takes great execution to be worth $20,000,000.

Obvious to you is amazing to others.

Are you helping people? Are they happy? Are you happy? Are you profitable? Isn't that enough?

The most important lesson is probably to spend less than you earn.