Philip was especially anxious to prevent division over the subject of the Eucharist. Through him Huldrych Zwingli was invited to Germany, and Philip thus prepared the way for the celebrated Marburg Colloquy. Although the attitude of the Wittenberg theologians frustrated his attempts to bring about harmonious relations, and although the situation was further complicated by the position of Georg, Margrave of Brandenburg-Ansbach, who demanded a uniform confession and a uniform church order, Philip held that the differences between the followers of Martin Bucer and the followers of Luther in their sacramental theories admitted honest disagreement, and that Holy Scripture could not resolve the differences definitively.