Unfortunately, many in our generation have committed so many sins that they have fallen into “concealment within concealment.” This “double” concealment can cause the person to fall into despair, G-d forbid, to feel there is no hope for them.
The first concealment is described as, “One who sins and repeats the sin perceives the sin as something permitted” (Yoma 86b). “Woe to those who call evil good, and good evil” (Isaiah 5:20). In this case, one is aware that Hashem is concealing Himself, due to the person’s sin. The person is also aware that what appears permissible is actually forbidden. In this single concealment, it is possible through Torah study to arouse oneself and come to know Hashem.
The second level of concealment is when a person continues in their sin and improper path. Hashem becomes concealed from the person in a “concealment within a concealment.” The person is completely oblivious to the fact that Hashem is hidden, and neither knows nor senses the need to search for Him. In fact, all evil things now appear to this person to be completely upright, G-d forbid. This second case is similar to, “I will haster astir (thoroughly hide)” (Deuteronomy 31:18). This is the “concealment within concealment.”
However, in truth, we must believe that even in all the concealments, including the “concealment within concealment,” Hashem is present. It is only that due to our sins, Hashem “hides” His presence from us. At this time, Hashem’s Torah cries out, “How long will you fools go on loving foolishness?” (Zohar III, 57b-58a). Through concerted effort in Torah study, the person begins to hear this voice, rousing the person to do t’shuva (repentance) and return to Hashem.
Based on Likutei Moharan I, 56:3