“Thus also in the Franciscan family, Roger Bacon, that scholar so dear to Our Predecessor, Clement IV, not only wrote learnedly on the Chaldean, Arab and Greek languages,[Opus maius, pars tertia.] but also facilitated their study for others. Following the above examples, Raymond Lulli, a man of singular learning and piety, urged with all the impetuosity of his nature, and obtained from Our Predecessors, Celestine V and Boniface VIII, favors which at the time were most unusual: that a Cardinal should be placed at the head of Oriental affairs and studies, and that Apostolic expeditions be sent to the Tartar, the Saracen, and other infidels, as well as to bring the ‘schismatics’ once more into the unity of the Church.”  --Pope Pius XI, Rerum Orientalium, September 8, 1928, Par. 4

Pope St. Celestine V, on being detained after his voluntary abdication: “I desired nothing in the world but a cell; and a cell they have given me.” (Quoted by Fr. Alban Butler in his work “Lives of the Saints”)