I'M A GOOD MESS

Have you ever being in a position where you know you are good. You know you can do this well, but you just don't know why a part of you keep telling you otherwise. It's not that you don't do it well but a part of you just just feel like you don't do it well enough. Everyone around you makes you believe you are doing well but deep down you don't feel the same.
I'm currently in that position right now. No wonder Omah lay's I'm a mess hits different recently

I'm a writer, I have people taking writing lessons from me, I'm a senior content writer for an organisation with writers under my supervision, people love my writing and I earn with my writing skills but, how come I keep feeling I'm not good enough. I want to do better, I want to get better.

Now here is the problem, today I feel like I'm good, tomorrow I feel I'm not. I don't really know what to believe. I keep telling writers under my supervision how cool their writing it.
I keep reminding them why it's okay to make a mistake because we are humans and not an AI and as humans,
mistakes are kind of inevitable but, why can't I tell all these to myself.

At times, it makes me feel like a hypocrite.
I mean, I teach these guys, I help them believe so much in themselves but why can't I do same, why can't I believe in my own self. When any of them is dealing with writers block they come to me and I serve as a very good source of inspiration that help bounce them back to their feet but here is my question. If I can motivate them why can't I motivate my own self.

This goes a long way in making me feel like a mess at times, at times I wonder if I really know what I'm doing or it's just in my head.
I wonder if I even know what I'm teaching these people. Can they really be as good as I have made them believe.
I always say to them "You are creative and cool, you are doing awesome it's just a little mistake and that's allowed since you are human."
But why can't these same set of words sink into my own head, is it that difficult to accept your own words or is my mind just playing games with me?
I guess it's the first or maybe the later. Anyone it is, I'm sure it's something huge and I need to break free from it because there is no space for such feeling in my 2025.