"Tell a team it's unbeatable and it will fall apart with its first loss. Then the finger-pointing begins. Teammates start blaming outside factors for their record instead of their own inadequacies. What can you expect? You told them they were great and they believed you. And defeats they suffer must be someone else's fault. Of course, on that inevitable day when they realize they are not as good as you claimed, that you sold them a bill of goods, you've lost them. They'll never believe you again."