The biography recounts the religious life and public labors of William Miller, tracing his spiritual experiences, theological study of prophetic texts, public lectures on the expected return of Christ, and the revivals that followed. It outlines his method of interpreting prophetic symbolism and chronological periods, presents contemporary criticisms and defenses, and acknowledges areas where his calculations proved mistaken while noting elements later endorsed by others. Drawing on memoirs, correspondence, and contemporary accounts, the narrative describes his character, preaching, community reactions, and the lasting debates generated by his teachings.