funny the way it is

It's funny how some days are better than others. Is it just by pure luck that you can wake up happy and go about the day without a hitch? How is it that you can have those days where one simple thing will be the end of your world, when your heart feels empty and your mind full. I know they say you are the master of your own soul, the creator of your own destiny, but sometimes you just wake up one day and things are not right. When you are fully convinced that in no way will things ever be right. So how is it that one day your mind is so fragile you can't complete one difficult task without shattering into a million tiny pieces unable to place your self back together, and the very next day, the pieces fit again. Each in its perfect place just like they had never shattered in the first place.