I think I learned a lot from reading in general - even from reading badly written books.
The Almighty gave us our lives, and I suppose He meant us to defend them, at least I have always acted on that, and I hope it will not be brought up against me when my clock strikes.
There is a hangover from a defeat like Denmark - ask any player about when they've had a bad game, it's still in there somewhere in the back of your mind.

