In this groundbreaking essay, Michael L. Cook addresses two major Christological concerns. First, Cook discusses how Christology must be Trinitarian insofar as it addresses and advocates a more active role of the Holy Spirit as a person. This includes both the economic activity of the triune life in creation and the dynamic, perichoretic, interactive life of God as God. Second, he examines how Christology must be ecumenical insofar as it addresses the concerns of both East and West with regard t...