Your inner critic is not a reliable witness
The voice that says you'll blow it feels like the truth. It's a scared story you learned to repeat.
In short
The inner critic sounds like clear-eyed judgement. It's usually a fear reflex, installed by other people, trying to stop you before you can be seen.
There's a voice most of us carry that narrates our worst moments back to us. You'll mess this up. They can see you don't belong. Remember last time. It speaks with total authority, and because it sounds like us, we assume it's telling the truth. It's a frightened story on a loop, and it's a lousy witness.
The critic usually shows up right before something that matters: an interview, a first date, a risk. That timing gives it away. It isn't there to describe you. It's there to stop you, because stopping feels safer than trying and being seen.
Where the voice comes from
Nobody is born with a running commentary on their own inadequacy. It gets installed. A teacher, a parent, a coach, a schoolyard, and their words become your internal narrator long after they've gone. What sounds like your own clear judgement is often someone else's throwaway line, still echoing decades later.
That's worth knowing, because you can question a voice you didn't write. You can't argue with "the truth." You can absolutely argue with "a thing my Year 9 maths teacher said once."
How to answer back
Catch the voice and write down exactly what it says. On paper, in plain words, the sentences lose their spell. "I always ruin things" looks flimsy in ink, and you can start finding the times you didn't.
Ask what you'd say to a friend in the same spot. You would never tell a struggling mate they're a fraud who's about to embarrass themselves. You'd be fair and specific and kind. Turn that same voice on yourself, not to inflate your ego, but to be accurate for once.
Give the critic a name, even a silly one. Distance helps. "Oh, that's just Kevin doing his thing again" beats treating every anxious thought as a verdict from on high.
And act while the voice is still talking. You'll never fully silence it, and waiting for it to quiet down means waiting forever. The goal is to do the thing with the critic yapping in the back seat, and to notice, afterwards, that the disaster it promised didn't arrive.
The voice will keep making predictions. You get to keep proving it wrong.