Why are two letters backward around these verses? Is the Torah out of order?
Open a Chumash to Bamidbar 10:35 and you will see a backward nun before the verse and another after verse 36. The Gemara says God put signs around this passage, and then gives two reasons. They disagree.
Rabbi Yehuda HaNasi, the sage who edited the Mishnah, says the signs are there because this passage is "a book by itself." By his count the Torah has seven books, not five: Bereishit, Shemot, Vayikra, the start of Bamidbar, this passage, the rest of Bamidbar, and Devarim. The Gemara says this fits a teaching that the "seven pillars" in Mishlei 9:1 are the seven books of the Torah.
Rabban Shimon ben Gamliel says the passage is in the wrong place, and one day it will be moved to where it belongs. It is here to separate two bad moments. Just before it, the people leave Sinai "from the mountain of Hashem" (Bamidbar 10:33). Rabbi Chama son of Rabbi Chanina hears that as "away from following Hashem." Just after it, the people complain and a fire breaks out at the edge of the camp (Bamidbar 11:1). Rav Ashi says the passage belongs in the section about the camp's flags, where the Torah lays out how the people traveled.
The Sifrei (an early collection of rabbinic teachings on Bamidbar) records this debate too. There the second view is given by Rabbi Shimon, with a parable. People ask a king to come with them to see the governor in Acco. By the time they get there, the governor has moved on to Tyre. Then Sidon. Then Antioch. Then the people start complaining about the king, because the road was hard. But the king is the one who should complain, since he made the trip for them. In the same way, God's presence traveled a long way that day so Israel could enter the land, and the people complained.
So the sources do not settle it. Either this passage is a small book of its own, or it is parked here between two failures. Both views agree the marks set these verses apart.
Shabbat 115b-116a,Rashi on Bamidbar 10:35,Sifrei Bamidbar 84Why does the Torah service open with a call for enemies to run away?
Moshe's words come from the desert. The Ark of the Covenant led the people on the road, and whenever it set out, Moshe said: "Rise, Hashem, and let Your enemies be scattered, and let those who hate You flee before You" (Bamidbar 10:35). The verse does not name anyone.
Rashi, following the Sifrei (an early collection of teachings on Bamidbar), explains it this way. "Your enemies" are the ones gathered together. Those who "hate You" are the ones chasing. And he says the haters are people who hate Israel, because whoever hates Israel hates the One who spoke and the world came to be. He backs this with Tehillim 83, which says of those who hate God: "against Your people they plot."
The Sifrei itself asks the question you may be asking. Can anyone hate the One who made the world? Its answer is that the verse is telling you something else: anyone who hates Israel is, as it were, hating God.
The Sifrei also explains "before You." When Your face is with us, we do not flee from them. When it is not, they finish us. On this reading, what Moshe is really asking for is God's presence to go with the people.
The siddur follows with a line from Yeshayahu: "For from Zion will go forth Torah." In the next verse of Yeshayahu, nations beat their swords into plowshares and do not learn war anymore. The siddur does not say why these two sit side by side. They do, one right after the other: a call for enemies to flee, then a picture of a world with no war.
Bamidbar 10:35,Rashi on Bamidbar 10:35,Sifrei Bamidbar 84,Yeshayahu 2:3-4Why is Brich Shmei in Aramaic, if angels do not understand Aramaic?
Brich Shmei is in Aramaic, the language of the Zohar. Most of the Gemara is in Aramaic too. Kaddish DeRabbanan asks why Kaddish itself is in Aramaic. Here the question is different: the Gemara has a warning about praying in Aramaic.
Rabbi Yochanan said that when a person asks for what he needs in Aramaic, the ministering angels do not attend to him, because the angels do not know Aramaic (Shabbat 12b, Sotah 33a). Rashi (the classic commentator on the Gemara, France, 1000s) explains that a person's prayer usually needs the angels to carry it in before God.
The Gemara in Sotah answers right away: that is about an individual. Communal prayer is different. In Shabbat 12b it gives another answer for a sick person: God's presence is with him. Rashi adds that this is why he does not need the angels. The Shulchan Aruch (Orach Chaim 101:4) rules first that a person may pray in any language with a congregation, while someone praying alone should use Hebrew. It then brings other views.
The Mishnah Berurah uses this to explain Brich Shmei. In a congregation, even Aramaic is allowed, which is why Yekum Purkan and Brich Shmei are said in public. He adds that by this logic, a person praying at home should not say Yekum Purkan, another Aramaic prayer.
Now look at the prayer itself. It says: "Not on a person do I trust, and not on bar elahin do I rely, but on the God of heaven." Bar elahin is literally "a son of gods," and the Soncino translation of the Zohar renders it "angels." So a prayer in the language the Gemara says angels do not know declares that it does not depend on angels anyway. That is worth noticing, though none of the sources above says it was meant that way.
Shabbat 12b,Sotah 33a,Rashi on Shabbat 12b,Shulchan Aruch, Orach Chaim 101:4,Mishnah Berurah 101:19,Zohar, Parashat Vayakhel