[Catholic Caucus] German Bishop: Laypeople Preach in My Diocese — and I Won’t Sanction Them The Vatican's reasoning for the ban on lay preaching is "not entirely consistent," Bishop Peter Kohlgraf of Mainz told Katholisch.de on August 11."The letter from the Prefect for Liturgy states that only the priest celebrating Mass may preach. But taken to its logical conclusion, that would mean a concelebrating priest or an assisting deacon shouldn't be allowed to preach either."Lay Preaching Is No ProblemIn the Diocese of Mainz, occasional lay preaching has become an established practice and Bishop Kohlgraf has no intention of changing that.In...