I think if you talk to the experts in any field where you have to take on a unknown challenge, where you're going to be working on it for a long time you'd find that to work themselves up to their best performance and really throw themselves into it, you know, spend all these hours in there and ah, give it their... give it their best that optimism plays a role.
Bill GatesIt's pretty amazing to go from a world where computers were unheard of and very complex to where they're a tool of everyday life.
Bill GatesNow you have to be a collaborator and you have to bring on governments and convince people.
Bill GatesNobody spends any money on smallpox unless they worry about a bio-terrorist recreating it.
Bill Gates