Your milieu is not the same as your sister’s. It is an ever-shifting, individual configuration of information flows. The Twitter feed you have curated is a milieu. Your friend group (which is not the same as the friend groups of the other people in that group!) is a milieu.
It is by changing your milieu that you change yourself.
Creating pedestrian plazas like the one in Times Square is prevalent in many European and Asian cities like Amsterdam and Tokyo. They prioritize public transportation and cycling infrastructure while U.S. cities often favor cars.
What you allow your milieu to feed into your mind is what you will be processing. It is what will carve the pathways of your brain. This is perhaps well-understood, in theory if not in practice.
But it is equally important to consider who and what you are sending output to.