Jan Chipchase had a session at CHI 2009 in which he presented some of his work gathered from all over the world. The work is definitely interesting and inspiring.
At one point in his presentation, he said something that got my attention. I think he was asked by a member of the audience about the boundaries [...]

There are many different ways to consider the difference between environment and surrounding. Dick emphasizing this in his lectures, especially when discussing the third mode of design (person-environment).
He tells a story of when he was young. How he had this telescope and would look at the stars at night. He was fascinated by the constellations. [...]