I open my fridge door and what do I see?
A half empty bottle of beer, relishes, old vegetables and water.
I close the door.
My groaning stomach persuades me to open the door once more. Like an alter ego, I obey it's commands.
I'm sure this time, there will be food, food that was invisible just a second ago. Food that I will see, if I look hard enough.
I grab the chilled silver handle and give it a pull. Wide open swings the door to reveal food galore!--
Oh wait, there's no food, not even a decent beverage. There's still just a whole load of nothingness and hunger.
A deep dark depression cuts me like a knife through butter. no food here, no food there, nothingness all around just starvation and suffering.
I close the fridge.
The cycle repeats itself.
Such is life.
Hunger and fullness are true emotions, just like love and life it can depress you or fill you.