" it is more about attitude than reality. Maybe it can’t be done, but always start out believing you can get it done until facts and analysis pile up against it. Have a positive and enthusiastic approach to every task. Don’t surround yourself with instant skeptics. At the same time, don’t shut out skeptics and colleagues who give you solid counterviews. “It can be done” should not metamorphose into a blindly can-do approach, which leaves you running into brick walls. I try to be an optimist, but I try not to be stupid. "

― , It Worked for Me: In Life and Leadership