The thing that may be driving how you feel is this:
* When you watch someone else do their job, or pull off some achievement, you only get to see their outward behaviour.
* When you perform a similar task you get to observe your behaviour, and also your inner state (thoughts, feelings, fears, etc...)
This is what makes it easy to assume everyone else is more competent, confident and sure of themselves than you.
The truth is that they may be experiencing similar emotions, fears and uncertainties that you are, but obviously they aren't displaying those emotions publicly.
This asymmetry underlies a famous 'law' of psychology, the so called 'fundamental attribution error'ยน, which, if I may paraphrase from wikepedia, is the: "tendency to believe that what people do reflects who they are".
So when you watch someone else behave competently in their job say, you can easily jump to the conclusion that that competence is an enduring trait of that person, i.e.: that they are competent.
However when you observe yourself perform a similar behaviour, even if the outcome is just as good, the access you have to your inner state makes it easier for you to discount your success as merely a passing state, i.e.: you don't believe yourself to be competent, and maybe think that you just got lucky that time.
Basically, don't make the mistake of assuming you are the only one to feel like this, most people do from time to time. We tend to publicly share our successes and wins, and hide our fears and anxieties.
* When you watch someone else do their job, or pull off some achievement, you only get to see their outward behaviour.
* When you perform a similar task you get to observe your behaviour, and also your inner state (thoughts, feelings, fears, etc...)
This is what makes it easy to assume everyone else is more competent, confident and sure of themselves than you.
The truth is that they may be experiencing similar emotions, fears and uncertainties that you are, but obviously they aren't displaying those emotions publicly.
This asymmetry underlies a famous 'law' of psychology, the so called 'fundamental attribution error'ยน, which, if I may paraphrase from wikepedia, is the: "tendency to believe that what people do reflects who they are".
So when you watch someone else behave competently in their job say, you can easily jump to the conclusion that that competence is an enduring trait of that person, i.e.: that they are competent.
However when you observe yourself perform a similar behaviour, even if the outcome is just as good, the access you have to your inner state makes it easier for you to discount your success as merely a passing state, i.e.: you don't believe yourself to be competent, and maybe think that you just got lucky that time.
Basically, don't make the mistake of assuming you are the only one to feel like this, most people do from time to time. We tend to publicly share our successes and wins, and hide our fears and anxieties.
1: https://en.wikipedia.org/wiki/Fundamental_attribution_error