I just read The Life-Changing Magic of Tidying Up: The Japanese Art of Decluttering and Organizing by Marie Kondo. I'd read articles about the book, but had never read the book itself, so I passed this rainy afternoon reading the actual book via my library's web app.
I do like her idea that having control over your home and the objects you own is good for the soul--it's not really about being neat or a minimalist, it's about only having responsibility for the things that you need or that bring you joy. If you drop the unnecessary baggage, your life will get easier and better.
One of the things that people had been talking about is the way Kondo would address objects aloud, and, for example, thank it for it's service before disposing it. I had wondered whether it was a psychological aide to help overcoming emotional attachment to objects. It is. But she also made a few oblique references to Shintoism, which is a Japanese religion that is nature based and incorporates the idea of a spiritual world which also includes objects or places that possess a spiritual presence or energy. (If you follow Shintoism, please excuse my oversimplification.) Apparently objects want to be put to use, and our things and our homes thrive when we take care of them and in turn they seek to take care of us.
To bring this back to motorcycles, I've always gone through my stuff and either passed on to the new owner or thrown out paperwork, extra bits-n-bobs, original parts, etc., when selling the old bike and bringing home the new bike. The only parts saved have been put to use on the new bike, like my Battery Tender lead, throttle boss and Scottoiler. So I don't have an accumulation of unnecessary stuff. And it would be nice to think my motorcycle wants me to be happy when I ride it.
