When Holy Scripture is read aloud in the liturgy, the church confesses with joy and thanksgiving that it has heard the word of the Lord. What does it mean to make that confession? And why does it occasion praise? The doctrine of Scripture is a theological investigation into those and related questions, and this book is an exploration of that doctrine. It argues backward from the church's liturgical practice, presupposing the truth of the Christian confession: namely, that the canon does in fact mediate the living word of the risen Christ to and for his people. What must be true of the sacred texts of Old and New Testament alike for such confession, and the practices of worship in which they are embedded, to be warranted? By way of an answer, the book examines six aspects of the doctrine of Scripture: its source, nature, attributes, ends, interpretation, and authority. The result is a catholic and ecumenical presentation of the historic understanding of the Bible common to the people of God across the centuries, an understanding rooted in the church's sacred tradition, in service to the gospel, and redounding to the glory of the triune God.