DR. GRINT: Well I think it's a very fine line between being confident and being arrogant. There are very few people who are confident enough not to be arrogant.

HATTIE: (Voiceover) These are the faces of confidence, not arrogance. Ken Done, Australia's most famous painter. Pamela Rogers, owner of Rodger's Chevrolet, a rare woman with an MBA who was succeeding in a male dominated industry. Gil Harper, owner of Weatherend, makers of fine outdoor furniture. And Tracy Myers, an entrepreneur who built a business for 20 years then sold it for millions.

DR. GRINT: I think the whole area of business encourages people who are going to be arrogant and confident and brash. You would not probably get very many people who are shy and retiring to be CEO's of major companies. There's an interesting book by Jim Collins, who talks about Level 5 leadership, and I think what, what Collins is saying is that bizarrely the most successful long term businesses are actually run by people who are personally modest as opposed to personally arrogant.