Leading is a difficult job. It comes with lots of responsibility and pressure. You could be leading anything from your dog to the entire country of the United States. And the more leadership you have, the more things fall apart when you fail.
I think the single most important aspect of leadership is leading by example. When you show yourself to be hypocritical, you destroy any reason for people to follow you. I mean if you’re not doing what you say, then why would they?