You Shall Rejoice on your Festival – and thus you will be happy. Sukkot / the festival of “Booths” or Huts – was given to the Jews when we were in the Desert.
The Outdoor Festival
We live in huts – with earth grown roofs – for seven days. We leave our permanent residence and live in a temporary hut – reminding us of our temporary stay in the world.
The reason we live in Sukkot – Huts – is to remind us of how we lived in the desert after leaving Egypt – in huts.
The Protecting Clouds
Another reason is to remind us of the clouds of glory. Seven clouds accompanied us in the desert. One was a pillar of cloud that guided us. Another cloud – above us shielded us from the heat of the sun. Four other clouds – protected us from enemies. One cloud below removed snakes and scorpions and noxious creatures.
Putting Materialism Aside
Living in the succah helps us to put materialism aside and appreciate Hash-m’s world. We put our faith in Hash-m and leave the comfort of our more-permanent home. It also serves as an atonement – because when we leave our home – it is as if we are lving in exile. This atones for our sins.
Living in the sukkah is a Positive Commandment from the Torah that is caused by time. Thus only men are obligated to live in the sukkah – for women – it is optional.
Serving G-d in All Ways
I thought of another reason – in Judaism – we go all out to serve our creator. At times we eat to serve Him – like on Shabbat – that we eat three meals of Shabbat. At times we fast – like on Yom Kippur – where we aspire to be like angels who don’t eat. We serve G-d inside the house – and outside the house (in the Sukkah). We serve Him – by resting – to get rest on Shabbat – and by staying awake – like on Hoshana Rabba & Shavuot – where we stay up all night to learn Torah.
Love of G-d
A person who loves his or her child is ready to do all for him. We – following Torah – show Hash-m we are ready to do all for Him.