In Reformed theology, expository preaching is considered the most faithful way to proclaim God’s Word because it ensures that Scripture itself dictates the message rather than human ideas. It is rooted in the conviction that the Bible is God-breathed (2 Timothy 3:16) and must be rightly divided (2 Timothy 2:15).

Key Principles of Reformed Expository Preaching

1. Text-Driven, Not Man-Centered – The preacher’s role is to unfold the meaning of Scripture, allowing the text to shape the sermon rather than imposing personal themes. This aligns with Nehemiah 8:8, where Ezra and the Levites “gave the sense, so that the people understood the reading”.
2. Christ-Centered Interpretation – Reformed expository preaching sees all of Scripture as pointing to Christ (Luke 24:27). Every passage is understood in light of God’s redemptive plan.
3. Systematic and Sequential – Many Reformed preachers follow the lectio continua method, preaching through entire books of the Bible to ensure the full counsel of God is taught (Acts 20:27).
4. Doctrinal Depth and Application – The sermon must not only explain the text but also apply it to the lives of believers, calling them to faith and obedience (James 1:22).

Historical Reformed Support for Expository Preaching

• John Calvin preached systematically through books of the Bible, emphasizing the authority of Scripture.
• The Westminster Directory for Public Worship (1645) instructed ministers to teach plainly the truth of God, grounding their sermons in the biblical text. (learn.ligonier.org) 
• Modern Reformed theologians continue to emphasize expository preaching as the most faithful way to proclaim the gospel. (reformedforum.org)