(Source: Fr. Lasance, The New Roman Missal,)
Pope Clement XII desiring to honor the Mystical Doctor of Carmel, famous for the help he gave to St. Teresa in the reform of her Order and for his mystical writings, in which he taught the science of the saints for the good of souls, introduced his feast in the Calendar. Pius XI (November 24, 1926) proclaimed him a Doctor of the Church.
His life was filled with difficulties and embittered by anxiety, fatigue, persecution and painful illnesses. When Jesus asked him one day what reward he desired for the labors he had sustained, John replied: “Lord, to suffer and to be humiliated for Thee.” He asked God to permit him to die where he would be unknown to all. He passed to a better life on December 14, 1591.
St. Clement, styled by St. Paul in his letters to the Philippians (iv, 3) as his “fellow-laborer,” succeeded St. Cletus as Pope in the year 90. He is named third in the Canon of the Mass, after the apostles. There is no serious reason for doubting his martyrdom, although the account of it is apocryphal.
That the Clement mentioned by St. Paul is the same as the pope and martyr, commemorated today, is denied by many. His church in Rome is an example of the Roman basilica of an early time. His Acts state that he was buried at Chersonesus in Crimea. When the Apostles of the Slavs, Cyril and Methodius, went to Rome with them as a gift to the Pope the relics of St. Clement discovered by them at Chersonesus.