Thormas ... we are only separate in that we are by and large completely unaware of our connection to our environment.
Perhaps you can explain to me how I am independent ... of the food I eat, education, experiences, evolution, genetics ... you name it. While an individual is a useful approximation or short hand for a pattern of energy/matter ... that is all it is. Perfectly adiabatic containers are useful metaphor for learning physics and chemistry ... Human beings are not them ... what goes into one comes out in some form another.
We might be magical ... but we are not magic.