The oxygen that we breathe in and out every minute of every day is not lost but shared re-used recycled recirculated.
If we are in the same room – or sealed hermetically for hours in the cabin of a plane – we breathe continuously the same air, the oxygen goes from me to you and back again.
But air currents, prevailing winds, the jet stream, cyclones and anti-cyclones, all move the atmosphere further and further still, so that even if we are on opposite sides of the globe, separated by oceans, it is a statistical certainty that I still breathe in atoms of oxygen that were once inside you.
Do they carry your thoughts, your feelings, your poetry to me, or mine to you? Who can say? I can but hope it, as I thank you for keeping me alive.