Anabaptism in Switzerland began as an offshoot of the church reforms instigated by Ulrich Zwingli. As early as 1522 it became evident that Zwingli was on a path of reform preaching when he began to question or criticize such Catholic practices as tithes, the mass, and even infant baptism. Zwingli had gathered a group of reform-minded men around him, with whom he studied classical literature and the scriptures. However, some of these young men began to feel that Zwingli was not moving fast enough in his reform. The division between Zwingli and his more radical disciples became apparent in an October 1523 disputation held in Zurich. When the discussion of the mass was about to be ended without making any actual change in practice, Conrad Grebel stood up and asked "what should be done about the mass?" Zwingli responded by saying the council would make that decision. At this point, Simon Stumpf, a radical priest from Höngg, answered saying, "The decision has already been made by the Spirit of God."