This rare volume provides a concise statement of the major ideas of one of the greatest Protestant thinkers of the twen tieth century, Karl Barth. Divided into three parts, it presents Barth's lecture ' The Holy Spirit and the Christian Life'. Discussion begins with the unity of the persons of the Trinity and the implications this unity has for human conduct This volume emphasizes Barth's focus on the trinitarian char acter of God's self-revelation. Barth insists there is no way to get behind or beyond the fact that God is revealed to us in three distinct ways, yet with a unity that cannot be divided. He claims that we can finally look only to God's self-disclosure as the reliable basis for Christian ethics.