A human is not one individual being. Inside us all there are many separate systems that negotiates with each other all the time. If you take a Jungian stance the mind consists of the conscious, subconscious and unconscious, all with separate values and goals, that together make up what we think of as our selves.
But the mind does not exist ex nihilo. It all arises from physical processes in our bodies. What we call a brain is actually a composite and should rather be considered as (at least) three separate brains: The reptilian complex, the limbic system and the left and right neocortexes.
Add to that the strong independent influence of the gut system, the reflex arcs of the spinal chord and many other autonomic regulatory processes. Then we start to see the complexity of the conglomerate that is a human being. We think with our whole bodies.
And it it does not stop within our bodies. There are numerous external connections that are impossible to omit when considering who we are and how we act. Cultural conventions, social interaction, political discourse, access to resources, different environments, and even the daily change in weather – it all greatly affects us, our behavior and our self-image.
Our minds are inextricably intertwined with the whole body. Our bodies are likewise inextricably interconnected with the whole outside world. We are not isolated individuals. We are highly connected networks. From our innermost thoughts to the utmost edges of the universe.
Our selves never end.