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The Library

Forty Centuries of Christian Writing

1780 works catalogued century by century, from the literature the Bible was written among to the present — each with a note on what it is, why it lasted, and where to read it.

401–500

The Fifth Century

9 works

c. 405; survives in fragments

Latin

On Nature

De Natura

Pelagius · c. 354–c. 420

An argument that God would not command what cannot be done, so human beings must be able to keep the commandments — known chiefly from Augustine's line-by-line rebuttal.

Contested · TreatiseRead elsewhere

c. 405–410

Latin

Commentary on Romans

Pelagius · c. 354–c. 420

A brisk, practical commentary emphasising moral effort and the example of Christ, which circulated widely under other names after its author was condemned.

Contested · CommentaryRomansRead elsewhere

412

Latin

On the Spirit and the Letter

De Spiritu et Littera

Augustine of Hippo · 354–430

The first sustained answer to Pelagius: the law shows what to do but cannot supply the will to do it, which only grace poured into the heart provides.

Western · TheologyRomans2 CorinthiansRead elsewhere

413

Latin

Letter to Demetrias

Pelagius · c. 354 – c. 420

Written to a Roman heiress of fourteen who had refused a marriage for the veil. Pelagius tells her to begin by measuring the good her own nature is capable of, since God would not command what could not be done, and no one is excused by a weakness they were born with.

Contested · LetterDeuteronomyMatthew1 CorinthiansRomansRead elsewhere

415

Latin

On Nature and Grace

Augustine of Hippo · 354–430

A line-by-line answer to Pelagius's On Nature, conceding that human nature was created good and insisting that it is now wounded and cannot heal itself.

Western · PolemicRead elsewhere

c. 410–430; authorship disputed

Latin

On the Christian Life

Attributed to Fastidius

A demanding call to moral seriousness addressed to a widow, insisting that a Christian who lives like everyone else is a Christian in name only.

Contested · TreatiseRead elsewhere

419–421

Latin

On Marriage and Concupiscence

De Nuptiis et Concupiscentia

Augustine of Hippo · 354 – 430

Marriage is good, its three goods are offspring, fidelity, and the bond — and yet the desire by which children are conceived is itself disordered, and carries the fault forward into every child born. Julian of Eclanum read this and accused Augustine of never having stopped being a Manichaean.

Western · TreatiseGenesisRomans1 CorinthiansEphesiansFull text

c. 421–422

Latin

Against Julian

Contra Iulianum

Augustine of Hippo · 354 – 430

Julian of Eclanum, a deposed Italian bishop and much the sharper logician, had accused Augustine of making God the author of evil and of importing Mani into the church. Augustine answers by assembling the fathers — Cyprian, Ambrose, Chrysostom, Basil — to show that original sin was taught before he was born.

Western · PolemicRomansGenesisJob1 CorinthiansFull text

c. 419–430; survives in Augustine's quotations

Latin

To Florus and To Turbantius

Julian of Eclanum · c. 386 – c. 455

The most formidable of Augustine's opponents, preserved almost entirely inside the books written to destroy him. Julian argues that a God who damns infants for another's act is worse than any human judge, that desire is a natural faculty like hunger, and that Augustine has never stopped hating the body.

Contested · PolemicRomansGenesisEzekielDeuteronomyRead elsewhere