All changes egoistic desires to altruistic, all corrections are followed peremezhivayutsya very strong falls. And the higher the level of knowledge, the harder, lower and baddest man falls in their sensations. So, one day, Rabbi Shimon Bar Yuhay, who wrote the book "Zohar", felt like some Shimon from the local market, where it has something to sell, buy, and did not aspire to the spiritual. At such moments a person feeling lost all its realizations. For the attainment of a higher level person to get a certain portion of egoism, fix it, ie, create a screen. Only the power of the acquired screen determines the next spiritual level of the person. Each portion of the next uncorrected egoism enters man in the sense of falling, the light goes away, all the spiritual becomes empty and unnecessary. Due to the addition of self-interest to have corrected his Kli disappears and light a person feels the pain of loss.