David the king longed for a drink of water from the well in Bethlehem, even though the city was under enemy garrison (II Sam 23). Some of his men snuck in and brought him some water. What did David do? Poured it out on the ground. Not that the WATER was special; the sacrifice/work BEHIND the water gave it value. So today at communion, I felt an urge to poor out my little cup of grape juice on the ground. The juice had no value, of course, but the sacrifice/work BEHIND it gave it value. And I was not worthy to partake of a sip when comparing the sacrifice.