4 Stages Of Golus, 4 Minim, 4 Walls

The Bechai Emor cites a Midrash ועוד דרשו בד' מינין הללו שהם רמז לד' מלכיות, והוא שאמרו בזכות ד' מינין שבלולב אני מצילכם מד' מלכיות.  The Shem MiShmuel (Hoshana Rabbah 5788) explains how the 4 stages of golus correspond to the three big sins + lashon harah and the four species counteract them.  The aravah who's shape is similar to lips counteracts lashon harah which corresponds to the golus of Edom.  This lines up with the writings of the Shem MiShmuel of Tzaria (discussed 2019) that the four stages of golus correspond to the nefesh, guf, sechal and tzuras ha'adam each one of which corresponds and becomes  contaminated with one of the three big sins + lashon harah.  The sin of lashon harah matches up with the tzuras ha'adam which is the connecting tissue of the various dimensions of man.  The corresponding  negative power is that of Edom.  The second Beis Hamikdash was destroyed because of sinas chinam which the Chofetz Chaim explains was due to lashon harah.  That leads to the golus of Edom and as we see it is the longest golus indicating this is the harshest sin.  That is why it is Hoshana Rabbah, the day of the hoshana which comes to atone for the sin of lashon harah which has the longest avodah. The Sfas Emes (5647 Hoshana Rabbah) notes as well that sinas chinam is an aravah which has no טעם וריח which is counterbalanced by the ערבה which has no טעם וריח.  In may be possible to suggest as well that the 4 walls of the sukkah (even though 4 actual walls are not required, the sukkah is viewed as enclosed on all sides (see Briskor Rav on Sukkah daf 7),) are also to serve as a means of protection against these 4 sins.  On Sukkot we wrap ourselves inside the protective walls to ensure we remain close to Hashem even as we travel through the 4 stages of golus.