That irritating, pesky voice is not you.
To observe something, it requires distance. A vantage point.
An astronaut observes the earth only when she away from it.
Yes, you can see your eyes with a mirror. Don’t get tricked. That’s a reflection of the image of your eye. It’s not your eyes.
Recognising that those thoughts are not you. They are conditioned by your upbringing, society and experiences.
That’s the beginning of the journey of better thoughts.