 From 1567 Sylvanus became pastor in Ladenburg and was emerging as a prominent figure within the Palatine church.The Palatinate would be rocked by controversy in 1568 on the question of church discipline, and Sylvan along with his friends Thomas Erastus and Adam Neuser emerged as leaders of the anti-disciplinist faction against Calvinists such as Caspar Olevianus.Sylvan was asked by Jan Łasicki to refute a work by the Italian Antitrinitarian Giorgio Biandrata.