I want to run again

Last night I dreamed about running. No, it wasn't agonizing or painful... it was free like the wind. I have pretty much given up on my dream to run the Boston Marathon... but there are times I wonder if I mustered all of my energy, if I changed my lifestyle to solely focus on this one goal... could I possibly qualify? It seems beyond impossible right now, but how many nights between now and the end of my days will I question if I failed not because I didn't physically have the ability, but because I just didn't try hard enough.