Take it from this picture, that logical and scientific minds alike would agree, that no matter what it is, the glass is always full - be it half full of water and half full of air.
The glass has never been empty, or half empty, if that's the case, then there is a vacuum we cannot account for.
Morons would suggest that if you see the glass always full or half empty, you're either in denial or delusional, do NOT believe them!
They would rather have you see it as half of something they cannot comprehend or be optimistic/pessimistic about, do NOT let them bring you down to your level.
The glass is ALWAYS FULL is the best way to think positively, no matter what you do!
