@csm18 answered the question at the end of my last post with something I have not seen written down before.

He starts a new project because the idea is big and he has never built anything like it. Maybe he will not be able to. That uncertainty is the fire. It gets him to start without asking whether the thing is practical.

Then comes the point where he can see the progress is real. If he keeps going, it will be finished. And at exactly that point:

once I know I can do it, I start to think if I can, then why should I worry about it. Whenever I want to I will, not now.

The fire goes out. The project sits at 40, 60, 80, sometimes 90 per cent.

I read that twice, because we usually tell this story backwards. The doubt is the problem, confidence is the cure, and if you are stuck it is because you do not believe in yourself enough.

His version is closer to the people I know who are good at starting. The doubt was never the obstacle. It was the engine.…