When we see a glass half filled with water, do we say it is half empty or half full?
If we say 'half full' we are looking in a positive way, if we say that it is 'half empty', we are looking at the negative aspect.
I would say that the glass is full.
You may wonder, 'How?'
The glass is filled half with water and half with air. This is the mystic vision. It is neither pessimistic nor optimistic.
If you want to be a mystic, see good all the time.