Failure is not fatal, but failure to change might be.
How hard you work at correcting your faults reveals your character.
Do not let what you cannot do interfere with what you can do.
I believe one of the requirements of good leadership is the ability to listen - really listen - to those in your organization. An effective leader is very good at listening, and it's difficult to listen when you are talking.
Make a decision! Failure to act is often the biggest failure of all.
Teamwork is not a preference, it is a requirement.