I will say one example my friend is first in clasee he had lot of over confidence he will become again first in class but unfortunately he became second because of over confidence he lost concentration on studies.
That is good example how people sometime get failed due to over confidence. :)
We need to have confidence. Then only we can achieve our goal. But if the same goes to over confidence it some times leads to failure :) but over confidence will give power to do anything.
