It is funny how the more successful people often believe that they have said more than what they have done and the others often feel that they have done a lot and spoken very little!
Confidence is to know what you know! And over confidence is to assume you know! And like its said when you assume -- you make an ASS of U and ME! (ASS-U-ME),
The reason for failure happens to be the fact that we assume to know a lot of things that we really don’t, and surprisingly this gives us a negative confidence! As guilty as I am for being overconfident at times I have always come to realize at the end of the exercise that, what I thought I knew was something I really sucked at! Just because you know “how” something is done does not mean you know it…. There is a lot of difference between knowing how to do thing and knowing “exactly” how to do it!