7 He nourished his soul unceasingly on this most pleasant food: he explained St. Paul's Epistles; he corrected the Latin version of the Old Testament by the Greek; he translated afresh nearly all the books of the Old Testament from Hebrew into Latin; day by day he discussed Biblical questions with the brethren who came to him, and answered letters on Biblical questions which poured in upon him from all sides; besides all this, he was constantly refuting men who assailed Catholic doctrine and unity. Indeed, such was his love for Holy Scripture that he ceased not from writing or dictating till his hand stiffened in death and his voice was silent forever. So it was that, sparing himself neither labor nor watching nor expense, he continued to extreme old age meditating day and night beside the Crib on the Law of the Lord; of greater profit to the Catholic cause by his life and example in his solitude than if he had passed his life at Rome, the capital of the world.
Source: Spiritus Paraclitus (Vatican.va)