Why Is The Creator Concealed From Man?
Everything is prepared beforehand [created in its perfect state] and each soul already exists in its entire light, abundance, and eternity. Only because of “shame” [in order not to feel humiliation because of undeserved reception] the soul came out of it [the initially created state of complete fulfillment by eternal pleasure] by the way of restrictions [increasingly greater concealments of this state] until it clothed in a filthy [concealing reception completely] body [egoistic desire].
Only [yet specifically] thanks to it, the soul returns to its source where it existed before the restriction along with the reward from the horrible path that she had traveled. All in all, the reward is complete adhesion. In other words, the soul gets rid of “shame” [undeserved reception] since its vessel of reception [egoistic desires] turn into the vessel of bestowal [altruistic desires], and it becomes similar to the Creator in its properties. [And hence is able to feel the entire Light that initially filled it.]
– Baal HaSulam, Pri Hacham, Igrot (Letters), Letter 25, pg. 81