So things are going well. Great, in fact. You're in the middle of a lovely day, midst conversation, surrounded by a large group of people who love you, the laughter and smiles around you are contagious - you're filled with this inexplicable sense of sadness. 

All of a sudden, it doesn't how solid and at peace you've been feeling, because all that disappears in a millisecond and you're facing a deep, dark voice of uncertainty, panic and fear. 

You know fully well this cannot be outrun, cannot be accounted for - cannot be questioned and there is no answer as to what it means for you. Often times, I wonder where this stems from - but it seems like it'll always be a rhetorical question with no answer to.