"I've never bought the idea that you learned much from losing. In my experience, you learn far more from winning, which also makes your players more receptive to criticism. All losing does is reinforce the things that cause you to lose, and I already know what they are. When you're out-prepared, out-coached, out-motivated, out-conditioned, outsmarted -- can you tell me something positive you can get out of that?"
From "Finding A Way To Win" by Bill Parcells