Jacob Fabritius was the director of the Danzig academy for almost 50 years and therefore determined the confessional identity of Danzig's pastors, who were recruited chiefly from the Latin school over a long period of time. At the same time, Fabritius was a champion of Calvinism in the predominantly Lutheran city of Danzig. This paper analyses Fabritius's programmatic sermon, given on October 24, 1596, in which he developed his understanding of the office and importance of the pastor, urged confessional unity amid the diversity of non-Catholics, and placed the pastors between the commune and the magistrate as apostles sent by God. Analysis of this sermon provides new insights into the relation between clerical and secular authorities and calls attention to the various ways in which sermons can be interpreted. Attention to these ways of interpretation contributes to a wider understanding of the structures of early modern society.