Its a metaphor for something...

Driving to pick a friend up at the airport the other night I was sitting at a red light when a bright red heart shaped, half deflated mylar balloon came dancing into the intersection. I watched it get thrown back and forth, swirling about, tossed on the air but somehow managing to stay afloat in its feeble attempt to keep its purpose.
I thought to myself, "that must be a metaphor for something." and smiled as I drove past it and watched in the rear-view as my car's gust of wind pushed the heart high in the air before it started its dance afresh.
I didn't get as far as deciding what the metaphor was until a couple nights ago on a walk. Then it was clear the obvious comparison to mankind's fragile hearts getting tossed about on the winds of life yet still popping back up for another go at it. People coming in and out of your life through death, moves and those temporary friendships that seem to rush by you much like the cars in the intersection. But what is it that is keeping you afloat? How do you still dance in the ups and downs?
Its what's inside the heart that counts. If it weren't for that little bit of helium left in the balloon doing its scientific magic the heart would already be in the trash.