Credibility is a leader's currency. With it, he or she is solvent; without it, he or she is bankrupt.
Holding a grudge is never positive or appropriate.
A person who refuses to risk change fails to grow.
Knowing how to do a job is the accomplishment of labor - showing others is the accomplishment of the teacher - making sure the work is done by others is the accomplishment of the manager - inspiring others to do better work is the accomplishment of the leader.
If we are growing we are always going to be outside our comfort zone.
Your talk talks and your walk talks, but your walk talks louder than your talk talks.