On This Rock
I will build my church
See how Christian traditions understand Scripture — side by side, from their own sources.
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- cited sources
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- key verses
I'm exploring traditions
Compare how six Christian traditions read Scripture — side by side, in their own words.
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I'm studying a doctrine
Work through a teaching question by question, with every answer tied to its sources.
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See any passage across trusted translations, then jump to what the traditions say about it.
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How On This Rock compares traditions
Neutrality here means process, not approval. Here's how we work:
Every tradition in its own words
Positions are written from each tradition’s own catechisms, confessions, and councils — never paraphrased by a rival.
How we earn trust →
Every claim sourced
Each position links out to the official documents it summarizes, so you can verify every claim yourself.
How we earn trust →
Every comparison neutral
All six traditions shown side by side, never ranked — with no winners declared.
How we earn trust →
Scripture first: every topic begins from the biblical passages each tradition itself cites as its anchors.
Official documents only: each position is summarized from the tradition’s own confessional and denominational sources — catechisms, confessions, and official statements — linked in the citations.
No imposed framing: positions are described in each tradition’s own categories and terms; no tradition is presented as the standard against which the others are measured.
Transparent citations: every claim about a tradition is tied to the primary source it comes from, so readers can verify it themselves.
Open corrections: every page is labeled "Initial release — under theological review." Readers can flag errors, and named reviewers from each tradition are being onboarded.
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Three ways in
New here? Pick the path that matches where you're starting from.
1
I'm exploring traditions
Compare how six Christian traditions read Scripture — side by side, in their own words.
Go
2
I'm studying a doctrine
Work through a teaching question by question, with every answer tied to its sources.
Go
3
Start from a verse
See any passage across trusted translations, then jump to what the traditions say about it.
Go
Library
Start with a topic
A preview of the comparison library — every topic shows each tradition's position from its own sources.
Baptism
One washing, six understandings — compare how traditions answer who should be baptized and what baptism does.
Communion (The Lord's Supper)
One table, many theologies — see how each tradition understands Christ's presence in the meal He commanded.
Salvation
Saved by grace — but how? Compare how six traditions describe justification, faith, and the Christian journey.
Mary, Mother of God
Honored by all, defined by few — compare how traditions understand Mary’s sinlessness, her Dormition or Assumption, and whether she should be invoked.
Purgatory and the Afterlife
What happens between death and resurrection? Compare Catholic purgatory, Orthodox prayers for the dead, and Protestant rejection of any middle state.
Scripture and Tradition
Who decides what the Bible means? Compare sola scriptura with Scripture-and-Tradition, and the magisterium, papacy, and councils that guard each.
Free tools
Compare any verse across trusted translations side by side, or ask a question answered only from this site's content.
Hot Topics
Where Christians disagree most
The flashpoints — each tradition stated in its own words, from its own sources. No winners declared.
Mary, Mother of God
Sinless, assumed into heaven, and invoked — or a blessed believer only?
Purgatory and the Afterlife
Purification after death and prayers for the dead — or no middle state at all?
Scripture and Tradition
Scripture alone — or Scripture with Tradition, magisterium, and councils?
Baptism
A sacrament that washes infants — or an ordinance for believers only?
Communion (The Lord’s Supper)
Transubstantiation and real presence — or a memorial symbol?
Church Government
A pope with universal jurisdiction — or elders and congregations?
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FAQ
Questions, answered honestly
Is this neutral?
That is the aim. We present each tradition in its own words, from its own sources, and we don’t rank positions, declare winners, or take sides. But neutrality is an aim, not a guarantee — and nothing here is endorsed or approved by any church or tradition.
Who is this for?
Curious Christians, small groups, students, pastors, and anyone who wants to understand what other traditions actually teach — as those traditions describe it themselves.
Is this theological or pastoral advice?
No. On This Rock is informational. For personal spiritual questions, talk to a pastor, priest, or trusted teacher in your own tradition.
Which traditions are covered?
Catholic, Orthodox, and Protestant. “Protestant” covers a wide range of churches, so positions note which stream they represent.
What do I get for free?
Browse every topic overview and quick-scan every headline. Premium unlocks study-note mode: full summaries, key points, and linked sources.
Can I cancel anytime?
Yes. Cancel in a couple of clicks from your account page. You keep access until the end of your billing period.
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