339. Rabbi Shimon opened the discussion saying, "For Hashem your Elohim walks in the midst of your camp, to deliver you..." (Devarim 23:15). "For Hashem your Elohim" refers to the Shechinah prevailing in Yisrael, all the more so in exile, to shield them always from all sides and from all other nations so that they cannot destroy Yisrael.
340. We have learned that the foes of Yisrael are not capable of harming them until Yisrael weaken the power of the Shechinah before the appointed ministers of other nations. Only then can the enemies of Yisrael overcome them, rule them and decree many harsh decrees regarding them. When Yisrael return towards Her WITH REPENTANCE, THE SHECHINAH smashes the power and strength of these appointed chiefs, breaks the power and strength of the enemies of Yisrael and takes revenge against them all.
341. Therefore, "shall your camp be holy" (Ibid.). One must SEE that he does not become defiled through his sins and through transgressing the words of Torah. If he does so, they defile him, as it is written, "That you should be defiled (Heb. venitmetem) by them" (Vayikra 11:43). The word "Venitmetem" is written without Aleph, POINTING TO AN EXTRA MEASURE OF DEFILEMENT. We have learned that there are 248 limbs in the body and all become defiled when one becomes defiled, meaning as soon as he wants to become defiled, it IMMEDIATELY ACQUIRES DEFILEMENT. "Therefore shall your camp be holy." What is meant by "your camp?" This refers to the limbs of the body. "That He see no unclean (lit. 'nakedness of') thing in you" (Devarim 23:15). What is a "nakedness of thing?" This is an allusion THAT YOU MUST NOT BRING a strange nakedness to come to this thing, FOR IT IS STRANGE TO MALCHUT CALLED 'THING,' as we have established. If YOU DO so, He will surely "turn away from you" (Ibid.). Therefore "your father's wife shall you not uncover" (Vayikra 18:8). What is the reason? It is because it is written, "It is your father's nakedness" (Ibid.), as we have established.
342. We have learned that Yisrael are detained in exile for three things: For treating the Shechinah with contempt in exile; for turning away their face from the Shechinah, AS IT IS WRITTEN, "FOR THEY HAVE TURNED THEIR BACK TO ME, AND NOT THEIR FACE" (YIRMEYAH 2:27). Finally, for defiling themselves before the Shechinah, WITHOUT CONSIDERING THAT THE SHECHINAH IS WITH THEM IN EXILE. We explained them all in our Mishnah.