I can't think of anyone I admire who isn't fuelled by self-doubt. It's an essential ingredient. It's the grit in the oyster.
“I remember when I was in college, people told me I couldn't play in the NBA. There's always somebody saying you can't do it, and those people have to be ignored.”
“What another would have done as well as you, do not do it. What another would have said as well as you, do not say it; what another would have written as well, do not write it. Be faithful to that which exists nowhere but in yourself-and thus make yourself indispensable.”