Enough of the 'glass half full or half empty' debate. It doesn't matter.
Here's what matters -- the ullage.
Ullage refers to the unfilled space in a container of liquid.
It's an old word originally having something to do with bung holes and barrels.
With this new way of looking at things, we are no longer forced to watch the contents of our glasses of wine, of our bottles of wine, or of our capacities for joy become smaller.
With this new way of looking at things, we can simply choose to watch the ullage of our glasses, our bottles, or our lives expand.
We choose how we see things. The names we call things matters.