Arthur C. Cochrane has spent a lifetime recalling the Christian church to its vocation: confessing faith in Jesus Christ as the one Lord and Savior proclaimed in Holy Scripture; confessing sin; and submitting in freedom to the ethic which springs from sole reliance on Christ. The vocation has given focus to many concerns. He has worked to invigorate Christian understanding of the role of confessions of faith, to revive careful study of Reformation theologians, and to develop appreciation of the contribution of Karl Barth. He has engaged in ecumenical dialogue, fostered ecumenical relationships, and worked to arouse Christians to ethical response concerning the poor, worship, the state and war. He has been acutely sensitive to the constant need to determine a Christian response to challenging contemporary events, whether horrors or opportunities.