Data Sources · Copyright Transparency
100% open disclosure of all theological materials used by SermonSage.
Trust begins with sources. This page lists the copyright status of every material SermonSage analyzes or references. Questions? Contact johnsoyo@gmail.com anytime.
Public Domain Materials
Works of theologians who died 70+ years ago are in the global public domain. SermonSage's core knowledge is built on the analysis of these 28 PD authors.
| Theologian | Years | Era | Key Works |
|---|---|---|---|
| Augustine of Hippo | 354–430 | Patristic | Confessions · City of God |
| John Chrysostom | 347–407 | Patristic | Homilies on Matthew |
| Martin Luther | 1483–1546 | Reformation | Galatians Commentary · Bondage of the Will |
| John Calvin | 1509–1564 | Reformation | Institutes · Commentaries on the Whole Bible |
| John Knox | 1514–1572 | Reformation | History of the Reformation |
| John Owen | 1616–1683 | Puritan | Mortification of Sin · Hebrews Commentary |
| Richard Baxter | 1615–1691 | Puritan | The Reformed Pastor |
| Thomas Watson | 1620–1686 | Puritan | Body of Divinity |
| John Bunyan | 1628–1688 | Puritan | Pilgrim's Progress |
| Matthew Henry | 1662–1714 | Puritan | Complete Commentary on the Bible |
| Jonathan Edwards | 1703–1758 | Awakening | Religious Affections · Freedom of the Will |
| John Wesley | 1703–1791 | Evangelical | Notes on the New Testament |
| George Whitefield | 1714–1770 | Evangelical | Sermons |
| Charles Spurgeon | 1834–1892 | Victorian | Treasury of David · Morning & Evening |
| D.L. Moody | 1837–1899 | Revivalist | The Way to God · Heaven |
| J.C. Ryle | 1816–1900 | Anglican Evangelical | Holiness · Expository Thoughts on the Gospels |
| George Müller | 1805–1898 | Faith Missions | Autobiography · Narratives |
| Andrew Murray | 1828–1917 | South African | Abide in Christ · Humility |
| Hudson Taylor | 1832–1905 | Missionary | Spiritual Secret · China Inland Mission |
| Charles Hodge | 1797–1878 | Princeton | Systematic Theology |
| B.B. Warfield | 1851–1921 | Princeton (early 20c) | Inspiration & Authority |
| Albert Barnes | 1798–1870 | Reformed | Notes on the New Testament |
| John Gill | 1697–1771 | English Baptist | Exposition of the Whole Bible |
| Adam Clarke | 1762–1832 | Methodist | Clarke's Commentary |
| Keil & Delitzsch | 1807–1888 · 1813–1890 | German OT | Commentary on the Old Testament |
| Pulpit Commentary editors | 1880–1919 | Victorian | Pulpit Commentary (23 vols) |
| Thomas à Kempis | 1380–1471 | Late Medieval | The Imitation of Christ |
| Brother Lawrence | 1614–1691 | Carmelite | Practice of the Presence of God |
Commentary Series (14)
PD materials indexed series-by-series and embedded via AI (gemini-embedding-001). All series are built from public domain or expired-copyright materials.
Anamnesis DB · Original Analysis
SermonSage's analyses, summaries, and cross-references of PD materials across 5 languages (Korean·English·Spanish·Japanese·Chinese) are SermonSage's own copyright. Users' own sermons remain their own copyright (auto-deleted after 30 days, never used for AI training).
Last updated: 2026-06-03