Every time I read Jesus' parable of the Last Judgment, I am struck by the adverb "when." 'Lord, when did we see you hungry, or when did we see you thirsty, or when did we see you naked, or when did we see you sick?' Both those who see and those who fail to see the needs around them ask the same question, "When?" Those who helped didn't remember helping; those who passed by didn't remember passing by. So the common question of all on the last day is "When? Lord, when?"
Mother Theresa once said, "I never look at the masses as my responsibility, I look at the individual. I can love only one person at a time. I can feed only one person at a time. So you begin with one. If I didn't pick up that one person, I wouldn't have picked up 42,000. My whole work is only a drop in the ocean. But if I didn't put the drop in, the ocean would be one drop less."