The works of Juan de Lugo, some of which have never been printed, cover nearly the whole field of
moral and
dogmatic theology. The works which de Lugo published in his lifetime are: • (Lyons, 1633) • • (Lyons, 1636) • (Lyons, 1638) • (Lyon, 1642) The last of these, which draws on de Lugo's legal background, became his most famous work. He dedicated it to the pope and presented it to him in person; the 1913
Catholic Encyclopedia credits it with earning him an appointment as cardinal. Three more of de Lugo's works were published after his death: • (Lyon, 1646) • (Lyon, 1651) • (Cologne, 1716) The first two of these were published by de Lugo's former pupil, fellow Jesuit and friend, Cardinal Francesco Sforza Pallavicino. Other works on theology and especially on philosophy: "De Anima", "Philosophia", "Logica", "De Trinitate", "De Visione Dei", etc. are still preserved in manuscripts in the libraries of
Madrid,
Salamanca,
Karlsruhe,
Mechlin etc. Among the unprinted works, the analysis of Arnauld's book,
De frequenti Communione and the ''Memorie del conclave d'Innocenzo X: Riposta al discorso ... che le corone hanno jus d'eschiudere li cardinali del Pontificato
may be of special interest; they are the only controversial works of Lugo. What he intended in his writings was not to give a long treatise, exhaustive from every point of view; he wished only "to open up a small river, to the ocean", without relating what others had said before him and without giving a series of opinions of previous writers or furnishing authors or quotations in number; he aimed at adding what he had found from his own reflection and deep meditation on each subject. Other features of his theological conceptions are the union he always maintains between moral and dogmatic theology, the latter being the support of the former, and the same treatment being applied to both, discussing thoroughly the principle on which the main points of the doctrine rest. From this point of view the last lines of his preface De justitia et jure'' are instructive. In several problems he formed a system of his own, as for instance about faith, the
Eucharist, the
hypostatic union, etc., and owing to the thorough discussion of the question at issue, his opinion is always to be taken into account. In moral theology he put an end, as Ballerini remarks, to several disputed questions.
St. Alphonsus de Ligouri did not hesitate to rank him immediately after the Doctor of the Church
St. Thomas Aquinas, "post S. Thomam facile princeps", and pope
Benedict XIV called him "a light of the Church". Two complete editions of Lugo's work were published at Venice in 1718 and 1751, each edition containing seven volumes. Another edition (Paris, 1768) was never completed. The last edition is that of Fournials (1868–69), in seven volumes, to which an eighth volume with the "Responsa moralia" and the "Indices" was added in 1891. ==See also==