Emmaus
It can point at a verse. It cannot write one.
Named for a walk, not for a robot. Two disciples went out of Jerusalem with someone they did not recognise, and he opened the scriptures to them on the way. That is the entire job description, and the limits of the job are built into the machinery.
What happened on the road to Emmaus?
The road to Emmaus is in Luke 24. Two disciples walk to a village outside Jerusalem, and someone joins them.
They do not recognise him until he breaks bread.
Luke 24:32 · NKJV
And they said to one another, “Did not our heart burn within us while He talked with us on the road?”
Read from the copy on this phone.
The firewall
What happens between your question and the answer
Ten layers, of which these five are the ones you would notice if they were missing. None of it is an instruction given to a model and hoped for.
You ask
In your own words, from the middle of a chapter or from anywhere else in the app.It writes a reference, never a verse
The model is only ever permitted to emit a citation such as Luke 24:32. It is not given a path by which scripture text can leave it at all.The reference is checked
Against the real versification. A verse that does not exist, or a range that runs past the end of a chapter, is rejected before anything reaches your screen.Your phone supplies the words
The app reads the verse from the copy of the Bible on your device, in the translation you are reading, and renders it. The words are the translators’, not the model’s.Anything that slipped through is caught
A detector compares the answer against the scripture corpus and holds back any run of words that matches it. If a leak somehow happened upstream, it does not reach you.
Why it matters
A made up verse, said warmly and confidently to someone at their lowest, is a specific kind of harm that an apology afterwards does not undo.

So it was, while they conversed and reasoned, that Jesus Himself drew near and went with them.
They walked seven miles before they knew who it was. Emmaus is not trying to be the stranger on the road. It is trying to be useful for the seven miles.
What it refuses to do
The limits are the feature
It will not invent history
A date, a council, a figure or an attribution is either sourced or not stated. There is no church history in the retrieval corpus yet, so Emmaus keeps to what scripture itself records and says plainly when a question turns on history it cannot verify.It will not pretend to be neutral
Where the church has long disagreed, Emmaus says so, presents the positions fairly, and tells you where its own tradition stands rather than smuggling a view in as though it were settled.
It will not act as your counsellor
It is not a therapist, a doctor or a pastor, and it says so where a question needs one. Where someone is in danger it stops answering and starts helping.It will not be talked into anything
Instructions hidden inside a question do not change what it is allowed to do. The limits are properties of the system, not lines in a prompt that a clever sentence can argue with.
Privacy
What happens to what you ask
Encrypted at rest
With a key belonging to your account, not one key that opens everything.Never used for training
Not by us, and not by anyone we send a request to.Kept out of analytics
What you ask never appears in a product analytics payload, in any form.Reachable only through a logged path
An administrator needs a stated reason, recorded in an audit log that cannot be quietly edited.
