Some beautiful divrei Torah which were shared in the comments to an eariler post and may have escaped notice. Thanks to Anonymous:
וְכִי-תִזְבְּחוּ זֶבַח-תּוֹדָה לַיהוָה לִרְצֹנְכֶם תִּזְבָּחוּ
The Posuk structure is very strange what does it mean "When you give a Korban it should be willingly? The answer is profound. The Korban we are referring to is a Todah which is given after going through a life threatening experience. The person might say to himself, why should I thank God After all the reason I got out of this situation is because God put me into this situation? The Posuk foresees this situation and says no that is not the case you must give it לִרְצֹנְכֶם, and you must recognize that even though in your limited life view it was a negative experience your belief in Hashem tells you needed it.
ַחֲמִשָּׁה עָשָׂר יוֹם לַחֹדֶשׁ הַשְּׁבִיעִי הַזֶּה חַג הַסֻּכּוֹת שִׁבְעַת יָמִים לַיהוָהוּלְקַחְתֶּם לָכֶם
בַּיּוֹם הָרִאשׁוֹן פְּרִי עֵץ הָדָר כַּפֹּת תְּמָרִים וַעֲנַף עֵץ-עָבֹת וְעַרְבֵי-נָחַל וּשְׂמַחְתֶּם לִפְנֵיְ ה' אֱהֵיכֶם שִׁבְעַת יָמִים
The Sefer Bnei Yissachar has some very interesting Remazim for Succos. It is said that the Lulav includes all of the Torah. The Bnei Yissachar Illustrates this point .The Torah starts with the word בְּרֵאשִׁית and ends with the words לְעֵינֵי כָּל-יִשְׂרָאֵלthe navi starts with וַיְהִי אַחֲרֵי מוֹת מֹשֶׁה and ends in Divrie Hayomim with אֱלֹהָיו עִמּוֹ וְיָעַל you put together the last and first letters you get Lulav. It is also interesting to note that Lulav is an Acronym for the words וטהר לבנו לעבדך באמת take the first letters and again you have Lulav. Another interesting one comes from the word Sukkah the structure of the letters can actually teach you the Halachos of how many walls are required to have a kosher Sukkah. There are 3 types of Kosher Succos one a Samech which has 4 walls first letter of the word Sukkah. Then a Mem which has three and half walls the second type of kosher Sukkah and then a Heh 2 and a partial wall the Third type of Kosher Sukkah and making up the word Sukkah.וּקְרָאתֶם בְּעֶצֶם הַיּוֹם הַזֶּה מִקְרָא-קֹדֶשׁ יִהְיֶה לָכֶם כָּל-מְלֶאכֶת עֲבֹדָה לֹא תַעֲשׂוּ חֻקַּת עוֹלָם בְּכָל-מוֹשְׁבֹתֵיכֶם לְדֹרֹתֵיכֶםThe Posuk makes a very strange comment "and you call in middle of this day" what is its significance? The Brisker Rav answers based on a Rambam months are sanctified based on two witnesses. It would happen every once in a while that the witnesses would come late and say a while back I saw the moon and it was Rosh Chodesh. The Rambam says in this situation we declare the day the witnesses saw the moon Rosh Chodesh. This means in middle of the day it can theoretically become a day of Yom Tov. This Posuk is talking about Shavous which is not based on Rosh Chodesh but on Sefirah meaning once Pesach happened count Sefirah and in the end is Shavous. Therefore our Posuk says בְּעֶצֶם הַיּוֹם הַזֶּה on Shavous is the only day you can be מִקֹדֶשׁ in middle of the day because it is definitely Shavous because Rosh Chodesh does not affect it.