There is materiality to our lives and our decision-making. Our traffic patterns, the places we live in, the thoughts we think and the conversations we have all have a real physicality. Physicality you may not be able to see or to clearly connect to its causes or effects, but that exists and informs our movements, habitats and relationships. We design this material world, often more through ommission than commission. It's design then helps conjure things out of us. And makes other things less likely.
Christopher Alexander's attempts-- in books like A Pattern Language-- to explicitly name design patterns that make structures alive rather than dead was a real service to anyone trying to build a material world that conjures life out of us.
For me, building these forts is about putting in practice, learning how to put into material form my desire to be alive, since much of what has been around me structurally since birth is dead space that conjures death from myself and others. These forts in process and form, for me, question what is worth protecting and preserving, and what behaviors a sane culture would seek to cultivate through all it builds.
I think that because this fort asks that of a person, it's innards can have a specific power to re-center energy. It takes you to a different place, where different ways of perceiving and being are possible. It implicitly asks what of yourself is most worth protecting.
More at: http://wehavetobeerrant.wordpress.com/2012/12/28/habitable-spaces/
and check out Angela's second TX fort at: