Presence: invisible to the eye but we recognise it when someone has it and we see the power it can have, both positive and negative.
The fact is that we take it with us everywhere, like a mini personal atmosphere. Some would call it the energy we bring. Our attention and connectedness to the things and people around us are affected by our presence with them.
We can choose how to use it, choose to focus it, maybe to hide it, sometimes consciously change it to manage a situation. We have patterns of presence, which we might be unaware of, they are our habits of being, part of who we are.
The interesting thing about it is the choices we make as to how we use it. What is your presence like?