The church officials are bishops, deacons, priests, widows (and orphans); deaconesses are also added, in one place rectors, and once subdeacons (these last may have been interpolated). The preface to the English translation states, "The most salient feature of the Didascalia is its exaltation of the authority of the Bishops ; yet there is no mention of the Bishops of Rome as superior over other Bishops." Celibacy is preferred for bishops but not required for that office, while even the combing of hair (as well as long hair) is forbidden for men in general, lest they attract women. Especially noticeable is the treatment which bishops are ordered to give to penitents. Even great sinners, on repentance, are to be received with kindness, no sins are excepted. The canonical penance is to be of two to seven weeks. However, if a converted man "of the Jews or of the heathen" returned again to the sect in which he came from, then he was not to be received a second time into the church, but were to be regarded as unconverted. (Didascalia 20:16)