To do this, we, jews, set up, decorate and live (if we're terribly dedicated) in our own temporary dwelling. We witness an empty space open to the elements - the winds, the rains, the sky, the air - gather about it 4 walls, an entrance where once there was nothing, a shelter, where once there was open sky. There's a sense of excitement in the novelty of it all, the creation of a "home", and what this means to us.
When we built the sukkah this year, I kept thinking about our concept of home. I'm a real home body, as Dror will back up, & I love the emotionally supportive & and comforting aspects of being in my own space, with the people I love, protected from everything external to it. Particularly in Australia, I feel we're all lucky to be here; Sydney, is a beautiful, clean and safe home, often sheltered from the realities and difficulties faced by the homes of the rest of the world.
Building the sukkah each year, I think, can act as a reminder to us of our place beneath the stars. Our homes, and our protection. We sort of take for granted the structures, apartments, houses, units & even societal laws that we live amongst. It's so normal to have walls, a ceiling and windows, that we perhaps no longer are able to see the significance and vulnerability of sectioning off a little space under the sky.