Owing to the carelessness of transcribers, the conjectural corrections of critics, the insertion of glosses and paraphrases, and especially to the preference for readings found in the earlier Latin versions, the text of St. Jerome was corrupted at an early date.
Because of mistakes made by transcribers, critics' interpretations, added glosses and paraphrases, and a tendency to favor readings from older Latin texts, the text of St. Jerome became corrupted over time.