Brain Plasticity as an Inner and Outer Phenomenon?

Based on a few readings about brain plasticity, it seems that every action we take from moment-to-moment creates changes in the brain. So it seems wise to try to be aware of the grooves we are carving, because it ultimately affects our own brain's wiring. A lot of our responses also depend on the actions of others... there's an interaction involved. So perhaps brain plasticity is both inner and outer, as we influence each other through our interactions. I think about my own ideals and beliefs... How I believe one of the fundamental challenges of being a Human Being is the idea of coexistence... and often what we define as "good" or "evil" relates to ways in which we go about coexisting, related to our own wants, needs, desires, preferences, and likes/dislikes. My own idealism wishes for equal consideration and respect, so it would be my own desire to try to find ways of cultivating that (while also acknowledging the ways I do not give equal consideration and respect... and why I might withhold.. what is it that I want from a situation) Perhaps both the inner and outer are like a garden to be nurtured, cultivated... Perhaps we are like trees... part of us rooted, yet another part of us with branches that change in response to ever-changing environments...