In other words we are exposing to public scrutiny thoughts and ideas that we may not even have realised we had, and in our insecurity we assume that they won't be good enough, that they'll open us to the mockery of others, including and especially our peers.
Yesterday's confidence that you can write a best-seller is today's certainty that every word you put on paper is a joke, that, even with your two left feet, you have more chance of becoming a successful ballroom dancer than of writing anything that anyone else would ever want to read.
I'm writing this post because I'm in precisely that position now. Having been refreshed and raring to go with my ideas for NaNo after my walk yesterday today I can only see the impossibility of it. Seriously? I think I can do this? I can create characters that people will warm up and a plot that will make them laugh? Who do I think I am?
Everything in me at this very moment is screaming, 'You're rubbish; that's what you are!'
But I will get through this. I know I will. As I said at the start of this post, writers experience more extreme lows - and highs. I'll be back up there.
I should now offer advice on how to break through the misery barrier - but I need to wallow a bit first. I'll go and do something 'more useful' - see how easy it is to slip into the writing is waste of valuable time lie? The good thing is that I've been here before so I know I will be back up that mountain.
And if I'm still in the plough of despond this evening I will be relying on my fellow Swansea NaNo writers to lift me when we have our inaugural meeting at Swansea Central Library at 7.00 pm.