This is an interesting topic , where did you find it as an AWA essay ?
Definitely it can be started as :
Winston Churchill’s epic statement, “We shape our buildings and afterwards, our buildings shape us,” is a fantastic observation of the architectural phenomenon, illuminating the fact that physical architecture is a static artifact and continues to transform us long after construction.
Personally i would agree with this. And would like to take it further giving examples how the physical architectures can affect your lives. The discussion could be taken into virtual forms by imagining people as flowing entities and physical architectures as stable forms that embrace hundreds of people in their lifetimes. ... Also several different forms of the buildings can be mentioned and how they are relevant for different people etc....
I would struggle to write a lot for such kind of topics i should say ... but should be ok. I hope you got some ideas from this.