How do I teach him to lose?

My five-year-old...the apple of my eye. How do I teach him to lose? How do I make him understand that winning is not everything? How do I teach him to understand that even if you do your best, it may still not be enough...but it is enough to make you proud of yourself. In a world where your success is judged by your victories, how do I make him understand that the real victories are not visible at all? How do I teach him to lose the battles in life to win the war of life in the end? How do I teach him to trust himself to give his best and not be the best all the time?

I give him unconditional love. How do I  teach him to love himself unconditionally? How do I teach him to respect himself because the world may not respect him? How do I teach him to look at himself through his own eyes, and not through the eyes of the world? How do I help him gain confidence in himself?

My five-year-old...the apple of my eye. How do I save him from the hard path of learning how to lose? How do I save him from learning how to lose too late?