Although the pastorals are written under Paul's name, they are different from his other epistles, and since the early 19th century, scholars have increasingly seen them as the work of an unknown student of Paul's doctrine. They do not address Paul's common themes, such as the believers' unity with Christ, and they reflect a church hierarchy that is more organized and defined than the church was in Paul's time. Some recent scholarship has concluded that Paul probably used an amanuensis, or secretary, in writing his letters which was a common practice in the first century.