The sermon centers on the foundational truth of justification by faith alone, rooted in Habakkuk 2:4 and developed through Scripture's consistent witness from the patriarchs to the New Testament. It emphasizes that faith is not a human achievement or merit but the instrument by which the sinner receives Christ's imputed righteousness, resting entirely on God's faithfulness and the finished work of Jesus Christ. The message contrasts this with pride and self-reliance, illustrated through the contrast of the Pharisee and the publican, and refutes false teachings—particularly Roman Catholicism—that conflate justification with progressive sanctification or human cooperation. Ultimately, the sermon calls all listeners to simple, present faith in Christ, affirming that salvation is secure, complete, and accessible to all, regardless of age, background, or spiritual history, because it depends not on the strength of faith but on the sufficiency of Christ.