United in the Blood of Jesus
The best way to understand the history of salvation is to understand it as the story of covenants between God and his people. In the Old Testament, covenants are typically sealed in blood and sacrifice. In today's first reading, Jeremiah prophesies a new covenant forged by the shedding of blood— Christ's blood on the Christ— which makes the whole world into the New Israel. Through the blood of that covenant, we share in the Divine Life.