While defining a house is usually brought down to thinking if the roof should be flat or not, the beginning of this concept was lifespan and tentativeness that makes it longer. If you think about aesthetics in that way, you start to understand why trees look the way they look, and that maybe in the world of our aesthetics they would no longer be aesthetic if only we weren't used to seeing them every day. Anyway, finding a purpose for architecture is way more inspiring than trying to draw at once. The purpose you find depends on you and what sits in your head, then. These spaces, built in Japan and USA, designed by Arakawa+Gins, help their inhabitants change their perception and their ideas, they invite a constructive cognitive action. Human roots are found in the words 'insecurity' and 'tentativeness' which stimulate immune system of each human. Comfort means death, tentativeness, surprise, beeing on guard means being young forever.
Moreover, every move humans make in their spaces is defined as 'architectural procedure'. Deep understanding of these procedures lets develop what is unexpected.