Recurring Niggles that Haunt Me

I keep thinking that I'm just not cut out for this.

The mountain is too high.

I'm just killing time trying to be a writer.

Who do you think you are mixing with these people.

You don't fit in. Accept your lot and get rid of it.

You're not talented.

All of these doubts fly through my mind almost every time I try to compose a piece. Lately with all the bugs it just seems I'm going nowhere.

Am I alone in thinking these things.