The sources for the life of Jerome are most plentiful. They consist primarily of his own writings, and in particular his letters. Jerome formed relationships with a number of Roman matrons such as Marcella and Paula, who were interested in pursuing an ascetic life. Jerome's place in the history of the Bible is based primarily on his role in the creation of the Vulgate, the standard edition of the Bible in its Latin form. A distinctive component of the biblical scholarship of Jerome is his ability to appreciate the literary quality of the scriptures. Jerome's achievements as a translator of biblical texts are closely related to his literary education and sensibilities. Jerome's major achievement as an expositor of scripture is his set of commentaries on the Old Testament Prophets. He wrote on all sixteen of them, the twelve Minor and the four Major Prophets.