Earlier quoted context omitted.
> I have had a number of failures at all phases of projects. I have a life philosophy about this: failure is the path to success (I've never learned anything by being right). It can be hard to maintain the mindset, but it's actually true -- we learn from our mistakes, so nothing is a failure as long as a lesson was derived from it. If you can maintain that mindset, it takes a lot of the stress out of things!
In general I agree and I've preached the same. But the moment when you're holding the result of a month of weekends in your hands and you have to drop it in the trash can is tough.
I don't do woodworking, but I do fairly complicated electronics projects as a hobby, and a similar effect happens. I made a special display case where I put those failed projects on display, next to the final successful one. It reminds me that the failed example was just a stage in development and makes me feel better.