Say you’re a graphic designer, but you just started in the field and graphic design wasn’t what you majored in.
You feel like you don’t belong and you don’t deserve your title, even though you’re several months into your job already and everyone thinks you’re capable.
Even though you’re doing the job and living the career of a graphic designer, you don’t feel like you are one.
The perspective applies here: there’s something in your mind/body that is rejecting and battling with reality.
That is imposter syndrome (or at least one way to think about imposter syndrome).