Maimonides taught, “While eating and drinking himself, one is obligated to feed the stranger, orphan, and widow, along with the other unfortunate poor…” (Laws of Yom Tov 6:18)

...We sit flush with the world, in a ‘house’ that calls attention to the fact that it gives us no shelter. It is not really a house. It is the interrupted idea of a house, a parody of a house… It is like that architectural feature called the broken pediment, the notch in the roofline of the facade of a house which leaves the mind to complete the line, and thus implants the idea of a line in the mind even more forcefully than an unbroken line would. So it is that the sukkah, with its broken lines, its open roof, its walls that don’t quite surround us, calls the idea of the house to mind more forcefully than a house itself might do.
And it exposes the idea of a house as an illusion. The idea of a house is that it gives us security, shelter, haven from the storm. But no house can really offer us this. No building of wood and stone can ever afford us protection from the disorder that is always lurking all around us. No shell we put between us and the world can ever really keep us secure from it. And we know this. We never really believed this illusion. That’s why we never felt truly secure in it [...]
In the sukkah, a house that is open to the world, a house that freely acknowledges that it cannot be the basis of our security, we let go of this need. The illusion of protection falls away, and suddenly we are flush with our life, feeling our life, following our life, doing its dance, one step after another.
Rabbi Alan Lew, z''l, from This is Real and You are Completely Unprepared