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The Library

Forty Centuries of Christian Writing

1577 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

5 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 · Treatise

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 · CommentaryRomans

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 Corinthians

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 · Polemic

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 · Treatise