So sure, start with a slogan. But don't bother wasting any time on it if you're merely going for catchy. Aim for true instead.
Seth GodinAn organization filled with honest, motivated, connected, eager, learning, experimenting, ethical and driven people will always defeat the one that merely has talent. Every time.
Seth GodinIn a race, sooner or later there's a moment that separates the winner from those who don't win. That instant is your chance, the moment you've been waiting for.
Seth Godin