In this aliyah, the Torah introduces us to the halachos of Maaser Sheni, the second tithe, which a Yid must set aside from his crops in the first, second, fourth, and fifth years of the Shemittah cycle. Hashem commands us to bring these holy fruits to Yerushalayim to eat them there in kedushah, which builds our yiras Shamayim as we stand in the place of the Beis HaMikdash.
We also learn the practical halachos of what to do if the journey to Yerushalayim is too long and difficult. The Torah gives us a beautiful eitzah to redeem the produce for money, carry that money up to the holy city, and spend it there on food and drink to rejoice before Hashem, while making sure we do not forget the Levi and the poor who depend on our tzedakah.
The aliyah outlines the system of Maaser Sheni, where a person must bring a tenth of his grain, wine, and oil to eat in the place Hashem chooses, or redeem it for money to spend on food for rejoicing in Yerushalayim if the way is too far. It then transitions to the halachos of the third year, when Maaser Sheni is replaced by Maaser Ani, the tithe for the poor. This tithe is left in the local towns so that the Levi, the convert, the orphan, and the widow can eat and be satisfied, bringing Hashem's berachah upon all the work of our hands.
The Torah is teaching us a tremendous chiddush here about how a Yid is supposed to experience the physical pleasures of this world. When the Torah speaks about Ma'aser Sheni, the second tithe, the pasuk says you should take your produce, or the money you redeemed it with, and spend it on whatever your heart desires, meat, wine, or anything else, and eat it there in Yerushalayim. Lichoira, we would have thought that indulging in physical desires is something completely separate from ruchniyus, maybe even a b'di'avad. But the Torah is mechadesh exactly the opposite: "And you shall eat there before Hashem your God, and you shall rejoice."
This is the yesod of our avodah. Hashem does not want us to run away from the world or pretend we do not enjoy a good meal. Rather, the Torah wants us to take those very physical desires and bring them "before Hashem." When you eat that delicious food in the presence of the Shechinah, with the consciousness that it all comes from Hashem's bracha, the eating itself becomes a holy act of avodas Hashem. Mimeila, the physical pleasure is elevated and becomes a vessel for yiras Shamayim.
But there is a crucial condition here that we cannot forget. The Torah immediately warns us: "Do not neglect the Levite... and the stranger, the fatherless, and the widow." You cannot have a real, holy simcha if you are only worrying about your own stomach. True simcha before Hashem is only possible when you open your heart and your table to those who have nothing. When you share your bracha with the poor and the lonely, then your physical enjoyment becomes a true kiddush Hashem.
Today, when you sit down to eat or enjoy any physical pleasure, take ten seconds before you begin to think: "Hashem, You gave me this pleasure, and I am using it to serve You and to have the strength to do Your ratzon." If you can, find a way to share some of your abundance with someone in need today, making your table a real mizbeach.