Matthew 25: 34-40, to be exact...
"Then the king will say to those at his right hand, 'Come, you that are blessed by my Father, inherit the kingdom prepared for you from the foundation of the world; for I was hungry and you gave me some food; I was thirsty and you gave me something to drink; I was a stranger and you welcomed me; I was naked and you gave me clothing; I was sick and you took care of me; I was in prison and you visited me.'
Then the righteous will answer him, 'Lord, when was it that we saw you hungry and gave you food, or thirsty and gave you something to drink? And when was it that we saw you a stranger and welcomed you, or naked and gave you clothing? And when was it that we saw you sick or in prison and visited you?'
And the king will answer them, 'Truly I tell you, just as you did it to one of the least of these who are members of my family, you did it to me."
And you probably know the rest...
How can it be so easy to think first and mostly only of ourselves; likewise, how can it be so easy to overlook everyone else?
Have mercy on us, Lord!
**note added, 10/25/10**
See this brief reflection on Matthew 25 from "Friendship at the Margins", by Christine Pohl and Chris Heuertz.
"When we recognize the significance of Jesus' words in Matthew 25 that inasmuch as we have welcomed 'the least of these' we have welcomed him, we begin to understand the extraordinary kind of identification and oneness available to us. As we love and live among those most likely to be overlooked--those who are poor, hungry, despised, imprisoned or sick--we find ourselves in intimate relationship with Jesus." (p. 122)