The more remote the level of a given vessel from anything that has to do with evil, the greater the light it was fit to receive. The gradation found in the respective distance from evil of the various levels derives from their gradation in terms of the maintenance of evil. (The ability of any given Sefirah to receive the light depends on its distance from the level of the lowest Sefirah, which is the one that maintains the evil.) For it is the lowest level of all that maintains evil. The level immediately above it, although not responsible for maintaining that evil, is nevertheless not far from it, while the next level above is still further away. The greatness of the lights in the vessels corresponds to the degree to which they have been cleansed.