"You can't let praise or criticism get to you. It's a weakness to get caught up in either one." - John Wooden

Having too much confidence can sometimes lead someone to be considered self-centered. When an individual constantly thinks that they are the best, they will never be able to acknowledge failure or coming in second. On the other hand, when someone does not take the time to recognize the accomplishments they have made or never pick their head back up from a moment of judgment, then they will continue down the road of a simple life. For more quotes presented by John Wooden, here is a website that contains over fifty more phrases for you to examine:
http://www.goodreads.com/author/quotes/23041.John_Wooden