Question: Baal HaSulam has a very nice example about a guest and a host. Can you please explain the example with regard to the ten Sefirot?
Answer: We cannot feel the shared experiences of the guest and the host yet, when the host, through spiritual states, fills the guest through his desire and at the same time with his attitude.
If the host had wanted only to please the guest, he would have created only a desire in him and would have filled it. Such a desire is called the still, vegetative, or animate nature and the guest would have had no other feelings.
The moment other feelings emerge in the guest, he begins to feel the host not simply like a dog who feels his master, but actually him as the one who bestows and himself as the one who receives.
This is not enough since the host wants the guest to enjoy and bestows unto him with all His heart. This is the reason that the feeling of shame does not emerge immediately in the guest; his attributes have to be further developed until they are expressed in the eight Sefirot in Malchut. Then he is able to feel the Sefira of Keter and to understand that he is different from the host and that he cannot receive because then he would be opposed to and opposite from the host in his attributes.
This is a problem. If I receive, I am opposed to and opposite from Him, detached and different from Him. While He is high, bestows, a source of pleasure and loving, I am so lowly that I love only what I receive and I am totally immersed in it.
Thus the feeling of Keter (the host) appears in Malchut and the feeling of itself, and it cannot tolerate that. Not knowing what to do, it simply refuses to accept.
There are different emotional explanations of the state in which Malchut begins to feel all the Sefirot that preceded it, the whole attitude of the host, of the Creator, to it, and so naturally it restricts itself and ceases to receive. This is its first move.
Having swallowed the Light, Malchut begins to perceive the attributes of Keter, of what is concealed in it. It begins to feel that by receiving, it becomes opposite from the Light. The Light bestows absolutely whereas Malchut receives absolutely, and thus the feeling of shame, which was intentionally created by the Creator, emerges in it, and it is so great that it causes Malchut to cease to receive. This is called Tzimtzum – Restriction.
From the Kabbalah Lesson in Russian 3/5/17