A good leader inspires people to have confidence in the leader. A great leader inspires people to have confidence in themselves.
As I sat down with my family to watch the often amusing and sometimes inspiring TV programme, Britain's Got Talent, there was clearly a very new dynamic on the panel of judges.
Head judge and creator of the show, Simon Cowell was back along with regular, Amanda Holden, and new judges, Alisha Dixon and David Walliams.
Previous judges have included Piers Morgan, David Hasselhoff and Michael McIntyre, but none have made Cowell seem much less cool and powerful, and more ordinary in the way that Walliams did last night.
He got away with it for three reasons: