His great work was the Theologia moralis et dogmatica, a compendium in catechetical form of Roman Catholic doctrine and ethics which has been much used as a students' text-book.
Et moralis of P. M.
Theologia dogmatica et moralis ad mentem S.
His best known works are: a manual of theology in 4 vols., Theologia eclectica, moralis et scholastica (Augsburg, 1752; revised by Benedict XIV.
Editions of the Theologia Moralis and other separate works are very numerous.
Among the authentic works of Nicolaus of Lyra are: (1) two commentaries on the whole Bible, one (Postilla litteralis, 1322-1331) following the literal sense, the other (Postilla mystica seu moralis, 1339) following the mystic sense.
Of the latter the best known are Summula casuum conscientiae (1627); Liber theologiae moralis (1644), and Universae theologiae moralis problemata (1652-1666).
In 1613 he published a book, Disputationes de Praecipuis Religionis Christianae Capitibus, which provoked the hostile criticism of orthodox scholars; in 1619 he published his Epitome theologiae, and some years later his Theologia Moralis (1634) and De Arte Nova Nihusii.
He wrote also Idea Philosophiae Moralis (1644).