Psalm 137 reminds us of the deep tragedies of the Babylonian exile when Jews found themselves ripped from their homes and taken to a place completely foreign to them. Many people in our own day experience exile: not only people who are torn from their land, but people in our midst who are alone, or ill, or unable to cope. To remember God is there, even in exile, is to know the power of Holy Communion, the suffering Christ shares, the invitation to all.