It could be objected that we have said two things that contradict each other. On the one hand we have made the comparison with a grainpile, from which a small portion is taken each time while the rest is thrown back. On the other hand, we have said that the maintenance of the evil of Keter is left to Chochmah and that of Chochmah to Binah, etc. But this is inconsistent with the metaphor of the grainpile, for the pile is an overall whole and cannot be considered a series of levels. This, indeed, makes more sense – for why does Chochmah have a stronger connection to the maintenance of the evil of Keter than the others?