Musar על סוכה 103:4

והיה כי יביאך ה' אלוקיך אל הארץ אשר אתה בא שמה לרשתה . "When the Lord your G–d will bring you to the land to which you will come in order to inherit it." The Torah speaks of terrestrial ארץ ישראל which is similar to its celestial counterpart. The word הארץ refers to the "earth" after one's death in which one "sleeps," i.e. refines the body through metamorphosis in order to be able to take one's place in one's original inheritance, the one intended for Adam before the sin. Just as on our earth there are two mountains, Mount Gerizim and Mount Eival, which symbolize blessing and curse respectively, so there are two parallel mountains in the Celestial Regions. One is generally known in our scriptures as ההר הטוב, or הר ה', "the Mountain of ‘good,’ or the Mountain of G–d," the one which can be climbed only by people who have complied with the criteria set down in Psalms 24,4. The other Mountain is known as הר שעיר, the Mountain of Se'ir, symbolizing darkness exuded by the evil urge. Our rabbis describe it as a "Mountain" because they view the overcoming of the evil urge as similar to the scaling of a mountain. The wicked, on the other hand, consider the evil urge as something they can easily control and therefore the evil urge appears to them merely as high as an hair, hence the name הר שעיר, "the mountain no higher than an hair." Were it not for the "good angels" created by our various מצות, our access to the Mountain of G–d would be severed completely. G–d in His great mercy decided to pay more attention to the "voice" of what these good angels relate about us than to the foul deeds we commit with our hands, i.e. הקול קול יעקב והידים ידי עשו, "though the hands are the hands of an Esau, the voice is that of Jacob." [A homiletical explanation by Midrash Shmuel of Genesis 27,22 applied to Akavyah's statement in Avot 3,1. Ed.] The words ואין אתה בא לידי עברה mean that if you have קול יעקב going for you you are in no danger at the hands of Esau, the hands of Satan. The meaning of the name הר גריזים is similar to the meaning of Psalms 31,23: ואני אמרתי בחפזי נגרזתי לפניך, "I said in my haste I am thrust out of Your sight." The Psalmist goes on to say that David learned that he had not been cast out by G–d after all. The function of Mount Gerizim then is to reassure us that Paradise lost is recoverable. Our deeds create the "good angels" whose pleas reach the throne of G–d. there are also barriers in the heavens between the different categories of צדיקים. Every righteous person occupies a station appropriate to his conduct while he lived on earth. Our Rabbis (Tanchuma Beshalach 10) explained that G–d made separate lanes when the tribes of Israel crossed the Sea of Reeds. They base this on Psalms 136,13: "Who divided the Sea of Reeds into גזרים, sections." The same happened when the Jewish people crossed the river Jordan into the Holy Land. This was one of the reasons twelve stones were erected in the river-bed; they marked where each tribe crossed.