Answer: The embryo agrees with whatever he is given and accepts everything as the best thing possible, although it is totally repugnant to his ego. He annuls his ego and although he does feel the influence he receives, he receives passively, without checking things out, that is, “above reason,” and values everything that he is given as the most beneficial and healthy for his development.
We all know that the most nutritious food is always the least tasty food. There is tasty food, and there is nutritious food, and these are two different things. However, since it is healthy for attaining the goal and the goal is very important for a person, he accepts the food that disgusts his ego by attributing great importance to this nourishment.
This is what happens on the degrees of Ibur (conception) and Yenika (sucking). In the state of greatness, the opposite happens: A person begins to feel great pleasure in bestowal. Then, he has to work against this so as not to receive this pleasure for himself. This is called “to receive in order to bestow,” when he sees that the Creator is indeed good and benevolent. He doesn’t restrict himself anymore or annul himself like in the states of Ibur or smallness.
However, if the embryo criticizes the food that the upper one gives him and doesn’t accept it as good, then a “miscarriage” occurs, a fall from the degree of Ibur.
From the 1st part of the Daily Kabbalah Lesson 5/2/13, Writings of Rabash