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Four Books of Sentences

work by Lombard
Also known as: “Sentences”, “Sententiarum libri IV”

Quick Summary

Peter Lombard's Four Books of Sentences, written between 1148 and 1151, became the standard theological textbook in medieval universities. This work compiled teachings from Church Fathers and medieval masters into a systematic treatise.1

The Sentences are divided into four books:
* Book I: Discusses God, the Trinity, divine guidance, evil, and predestination.
* Book II: Covers angels, demons, the Fall of man, grace, and sin.
* Book III: Focuses on the Incarnation of Jesus Christ, redemption, virtues, and the Ten Commandments.
* Book IV: Addresses the sacraments and the four last things (death, judgment, hell, and heaven).1

Lombard's clarification of the theology of the sacraments was particularly significant, asserting there are seven sacraments and defining them as causes of the grace they signify. His work was widely commented upon, notably by St. Thomas Aquinas, and remained influential until the 16th century.12

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