Those of us who may limit the meaning of "eternal life" to heaven can get a richer meaning from this prayer. Jesus defines eternal life as a life shaped by knowing God and knowing Jesus Christ who has been sent by God.
In the days to come, these disciples will come together and scatter apart. The church still does. Jesus prayed that God would protect us so that we would be one. How unified are we? In what ways do we demonstrate that we know God? In what ways do we demonstrate that we are part of the world?