vices

If I was going to push a very heavy box across the room I would bend down and really push hard with my legs. I would expect it to go pretty slowly at first making very little progress. The box would not want to move but with continued force the friction between the box and the carpet would begin to give. It would move very slowly making only millimeters of progress. But as I began to succeed, it would begin to get easier. The first millimeter gave way to another millimeter and at each inch of progress it would begin to move easier and easier and soon the momentum would begin to carry the box almost on it's own. The difficulty is setting down and pushing with all my might against my very own vices.