I wonder how people( almost 98 %)talk so confidently about confidence within themselves but not amongst others as well as in their work....

Confidence is like a undie. One should wear it but shouldn't flaunt it.
Had it been true then why isn't all these "confident" people successful in their respective fields???

I just don't believe when a person says that he has given his or her best at.
If a person knows his best then what's the need to practice n work hard. Just give your best any time without any preparation even when u r asked to do so in the middle of the night(sorry not in the bed) Did all the great sportsmen knew that they would be giving their best n creating some kind of record before they took to the field??