"Once it's open it has to be finished"

Here's a belief about bags rather than about you. An open bag is a bag in progress. It'll go stale. It's a waste to leave it. Finishing it is tidiness.

Take the staleness first, because it's the practical half. Crisps left open overnight do go soft. Crisps with the bag folded over and a clip on it, or the top rolled and tucked, don't, or not much, and certainly not by tomorrow evening when you'd have the next bowl. A bag clip costs almost nothing and it converts an open bag from a thing that has to be finished into a thing that's been started. Sweets don't go stale at all. Nuts keep for weeks. The staleness argument is true of one snack for one night and gets applied to everything.

Then the tidiness. A finished bag feels tidy because it's gone, and a half bag in the cupboard feels like a loose end. But the tidiness is bought with a hundred and forty crisps you didn't want, and if someone offered you the choice between a slightly untidy cupboard and eating a hundred and forty crisps to avoid it, you'd take the cupboard. The run isn't tidying. It's eating, and calling it tidying is the unit from chapter 3 finding a reason.

There's also what "has to be finished" is a version of. It's the bag being the unit again, in different clothes. An open bag presents itself as a thing with an end, and the end is the bottom, and the mind supplies a reason why the end has to be reached tonight. Staleness, waste, tidiness. The reason changes with the snack and the conclusion is always the bottom.

Nothing has to be finished. A bag of crisps has no deadline. What has an end is the bowl, and the bowl's end is where you put it, and once you've had the bowl and clipped the bag, the cupboard has an open bag in it, and that's a cupboard with tomorrow's snack already open, which is a convenience and not a loose end.