Popularity is not leadership.
The more thou sweateth in training, the less thou bleedeth in combat.
Have character, but don't be a character.
I ask my children (all of them) to be what they want to be; just be the best they can at what they choose.
Change hurts. It makes people insecure, confused, and angry. People want things to be the same as they've always been, because that makes life easier. But, if you're a leader, you can't let your people hang on to the past.
Pain was their body's way of telling them that they'd pushed themselves to their limits - which was exactly where they were supposed to be.