Why is it that when the lives of two friends or colleagues of similar backgrounds, education, age, and ability are compared, we often see that one has achieved great things in all aspects of their lives with seemingly very little effort or restriction, whilst the other has struggled and fumbled through, been easily discouraged and de-motivated and looked up to their colleague other with increasing envy and frustration? The difference that makes the difference between these two individuals often simply comes down their level of self-confidence.