People who are 100% comfortable in themselves are:
Celebrities
Millionaires
Successful
They seem (appear) to other people, who are not successful.
Cocky
Arrogant
Weird (different)
Well they appear to be like this because they are different
If you be 100% confident while following the golden rule you are perfect.
And I have never met a perfect person, don't get me wrong I've seen 99% but that 1% flaw I find, then I judge the other person as:
Cocky
Arrogant
Weird (different)
Enter Jealousy ?!?!
I'm not perfect Yet...
Because I judge?!?!
I'm sure there Judging people too who view them as " different" so that means there jealous as well, jealous of being "normal"
So no one can be perfect.
But if You can find the right BALANCE, You will be close, not 100% but close.
THE POINT...
In this industry, The two killing mentalities are Greed (wanting as much money as fast as possible to become bigger, better and more successful then Your peers)
and Jealousy (envious of Your peers kicking in the Greed)