We begin the first of three days reading the 105th Psalm. This is a Psalm of praise for God’s covenant faithfulness to Israel. It is easy for God’s faithfulness to fade into the background of our consciousness. Our human nature leads us to take for granted the constancy of God’s sustainment of creation. But as the theologian Paul Tillich said, God is the “Ground of Being.” All of us are and remain utterly contingent, utterly dependent on the God who is before and beyond us.
The reading from Genesis is the account of the long-anticipated but much-doubted birth of a son to Abraham and Sarah. God has done what all deemed impossible. This is an occasion to celebrate. As Sarah says, all who hear it should be rejoicing with her. This is a high point in the account of Israel’s history that we might gloss over. God’s plan to bless the world will not be thwarted. As we are reminded in the selection from Hebrews, God’s purposes are eternal and unshakeable.