Sukkos as Hashem gathering us in

סכות נק' חג האסיף שכל אחד מאסף כל רכושו לביתו.

Sukkos is called Chag HaAsif (the Festival of Ingathering), for everyone gathers in all his produce to his home.

The season of Sukkos is the time of the harvest, when a person brings in everything he has labored to grow and stores it safely in his house.

ולכן צריכין לזכור כי אנחנו וכל אשר לנו להשי"ת.

Therefore we must remember that we, and all that we have, belong to Hashem Yisborach.

Precisely at the moment of gathering in our possessions, we are meant to recall that neither our wealth nor we ourselves truly belong to us — everything is Hashem's.

וכמו שכאן היא זמן אסיפה כמו כן הוא לעילא שהקב"ה מאסף אותנו לביתו והוא הסוכה:

And just as here below it is a time of ingathering, so too it is Above — that the Holy One gathers us in to His house, and that is the sukkah.

The physical harvest mirrors a spiritual one: just as we gather our crops, Hashem draws Bnei Yisrael close and gathers them into His "home," symbolized by the sukkah that envelops us in His shade.

Summary: Sukkos as the Festival of Ingathering reminds us that we and all we own belong to Hashem. As we gather in our harvest below, Hashem gathers us in to His own house — the sukkah — drawing Bnei Yisrael close in His embrace.