I could not say this any better-  

“The inflated ego that comes with success — the bigger salary, the nicer office, the easy laughs — often makes us feel as if we’ve found the eternal answer to being a leader. But the reality is, we haven’t. Leadership is about people, and people change every day. If we believe we’ve found the universal key to leading people, we’ve just lost it.” 

Knowing thyself is a powerful tool for growth- many think cognitive dissidence makes this impossible.  However knowing when, and where you’re full of it- is an important factor in getting a clear self view.  Enjoy and be challenged!!