Religion and Philosophy As a philosopher and logician, Cajetan defended the idea of
analogy. Though as a theologian Cajetan was a scholastic of the older
Thomist type, his general position was that of the moderate reformers of the school to which
Reginald Pole, later
archbishop of Canterbury, also belonged; i.e., he desired to retain the best elements of the humanist revival in harmony with
Catholic orthodoxy illumined by a revived appreciation of the Augustinian doctrine of justification. In the field of
Thomistic philosophy, he showed striking independence of judgment, expressing liberal views on marriage and divorce, denying the existence of a material
Hell and advocating the celebration of public prayers in the vernacular. Some Dominicans regarded his views as too independent of those of Saint Thomas. The
Sorbonne in
Paris found some of these views heterodox, and in the 1570 edition of his celebrated commentary on
Aquinas'
Summa, the objectionable passages were expunged. In this spirit, he wrote commentaries upon portions of
Aristotle and upon the
Summa of
Aquinas, and towards the end of his life made a careful translation of the
Old and
New Testaments, excepting
Solomon's Song, the
Prophets and the
Revelation of St John. Cajetan also wrote opinions on subjects of practical importance, such as the disposition of plundered goods whose ownership could not be determined. Of the
Reformation he remained a steadfast opponent, composing several works directed against
Martin Luther, and taking an important part in shaping the policy of the papal delegates in Germany. Learned though he was in the
scholastics, he recognized that to fight the reformers he would need a deeper knowledge of the Scriptures than he possessed. To this study he devoted himself with characteristic zeal, wrote commentaries on the greater part of the Old and the New Testament, and in the exposition of his text, which he treated critically, allowed himself considerable latitude in departing from literal and traditional interpretations. Cajetan was a man of austere
piety and fervent zeal. And from the standpoint of the Dominican idea of the supreme necessity of maintaining ecclesiastical discipline, he defended the rights of the papacy and proclaimed that the pope should be "the mirror of God on earth." In
Aeterni Patris,
Pope Leo XIII cited Cajetan as to why St. Thomas and the Thomistic school as a whole shall be the fundamental school of the Roman Catholic Church, which marked the revival of Thomism starting
Neo-scholasticism or the Neo-Thomist movement. He says: "Among the Scholastic Doctors, the chief and master of all towers Thomas Aquinas, who, as [Cardinal] Cajetan observes, because 'he most venerated the ancient doctors of the Church, in a certain way seems to have inherited the intellect of all.'" This would further influence the Church, and in 1923, by
Pope Pius XI in Studiorum Ducem, made St. Thomas Aquinas officially titled as the Common Doctor (or Universal Doctor) of the Church, in Latin: Doctor Communis.
Views on papal authority Against the Council of Pisa's advocacy of
conciliarism, which placed the authority of a general council above the pope's authority, Cajetan responded that a general council could only judge a pope if the pope had become a heretic. In the case of a wicked but non-heretical pope, Cajetan insisted that resistance is sufficient to reduce abuses, while deposition is inadmissible as a council convened without a pope would be "headless" (using the scriptural analogy of the relationship between sheep and their shepherd). In the case of heresy, however, Cajetan wrote that an exceptional general council could be convened to grant the reigning pope a fair hearing, and if he was judged to be in heresy, the council could act to sever the bond between the man holding the papacy and the office itself. Cajetan, building on similar discussions from
John of Paris and
Augustinus Triumphus regarding the removal of heretical popes, interpreted Titus 3:10 as saying that a heretical pope should be deposed after two admonitions.
Economic thoughts In light of the contemporary economic development, Cajetan cogitated a lot about the morality of trade. More conservative than the future
School of Salamanca, his reflections were nonetheless quite modern with utilisation of practical consideration outside of pure theorical thinking and some relevant ideas, like the formulation of the
liquidity preference. However his views on
usury were still conservative, as showed by his condemnation of
mounts of piety (that he tried unsuccessfully to ban during the
Fifth Council of the Lateran), his disapproval of
usury or his prohibition of
contractum trinius. ==Scholastic assessment==