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The Church Fathers · c. 190
On the Apostolic Preaching
Epideixis
Irenaeus of Lyons · c. 130–c. 202
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What it is
A short positive summary of the faith for a friend named Marcianus — creation, fall, incarnation, and the prophecies fulfilled — written without the polemic that fills Against Heresies.
Why it lasted
The earliest surviving Christian catechism, lost until an Armenian manuscript surfaced in 1904.
Scripture it works from
Where to read it
Public domain and free to read in full, though not held here. The archives below have it.
These open a search on each archive rather than a direct link, which is the honest way to point at an edition nobody here has checked line by line.
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