It could be objected: What need is there to say that it is called “hollow” in relation to Eyn Sof? Should we not say it is called “hollow” because it is still in need of perfection? The answer is that inasmuch as the container was at that time filled with the Residue, it should not have been called hollow. However, in relation to the encompassing Eyn Sof, blessed be He, Who is perfect in every way and to Whom the concept of further perfection is not applicable, it is called hollow. It is also called hollow relative to what it was when it was filled with the Unlimited, which departed from it.