sentences:  In 1521 he joined a group gathered around Zürich reformer Huldrych Zwingli to study the Greek classics, the Latin Bible, the Hebrew Old Testament and the Greek New Testament.Core members of the group broke with Zwingli because they thought the reform process was proceeding too slowly.At a gathering in January 1525 George Blaurock asked Grebel to baptize him upon a confession of faith.