“Tidying in the end is just a physical act. The work involved can be broadly divided into two kinds: deciding whether or not to dispose of something and deciding where to put it. If you can do these two things, you can achieve perfection. Objects can be counted. All you need to do is look at each item, one at a time, and decide whether or not to keep it and where to put it. That’s all you need to do to complete this job. It is not hard to tidy up perfectly and completely in one fell swoop. In fact, anyone can do it. And if you want to avoid rebound, this is the only way to do it.”