The key for me, Ygolo, was learning not to measure my worth by someone else's yardstick. As I get to know myself I have a better understanding of what I am capable of and where my limitations lie.
Then, instead of comparing myself to someone else, I measure my progress by my own goals and capabilities. This produces a more honest and realistic viewpoint of how I'm doing.
What shows on the outside to others? I hope a balanced human who knows, accepts and challenges himself.
When I was in my twenties and thirties I was confronted several times with wearing an arrogant presentation. That puzzled me because I wasn't aware of feeling arrogant.
In time I figured out that when I encountered a situation I was unsure of that appearance of arrogance would show to others. It was a defense, apparently. An attempt to appear competent when I was afraid that I wasn't. It was actually fear which was misinterpreted by those around me because I was trying to hide it.
What a social mess that would create! It held me apart from others in the need to protect my "secret" and caused others to feel wary in my presence.
As I've gotten to know myself better and learned coping skills for different types of social situations I have dropped that fear of managing in unfamiliar situations.
I've learned to say, "I don't know." or "Give me your thoughts on this." And with that I have learned to function interactionally, getting external feedback from others while I monitor myself and my perceptions.