It is a spectacular passage. And it almost certainly is something very close to what Jesus actually said. And why? Because it is not at all what the early Christians thought about how a person gains eternal life. The early Christian church taught that a person is rewarded with salvation by believing in the death and resurrection of Jesus. The Apostle Paul, for example, was quite adamant that people could not earn their salvation by doing the things the law required them to do, or in fact by doing anything at all. If that were possible, there would have been no reason for Christ to have died (see, for example, Gal. 2:15-16, 21). Even in Matthew's Gospel the focus of attention is on the salvation that Jesus brings by his death and resurrection. In this saying of Jesus, however, people gain eternal life not because they have believed in Christ (they have never even seen or heard of the Son of Man), but because they have done good things for people in need. This is not a saying that early Christians invented. It embodies the views of Jesus. The Son of Man will judge the earth, and those who have helped others in need will be the ones who will be rewarded with eternal life.