He sought to establish a via media between the doctrines of Luther and Zwingli, and vainly hoped to obtain for it Luther's acceptance.
In theology he followed Zwingli, and at the sacramentarian conferences of Heidelberg (1560) and Maulbronn (1564) he advocated by voice and pen the Zwinglian doctrine of the Lord's Supper, replying (1565) to the counter arguments of the Lutheran Johann Marbach, of Strassburg.
They comprised two parties: (1) the followers of Capito, Carlstadt and Bucer, who at the diet of Augsburg presented the Confessio Tetrapolitana from Strassburg, Constance, Lindau and Memmingen; (2) the followers of the Swiss reformer Zwingli, who to the same diet presented his private confession of faith.
Among current serials may be mentioned Archives de psychologie de la Suisse romande (1901) edited by Flournoy and Claparede; Jahresverzeichnis der schweizerischen Universitatsschriften (1897-1898); Untersuchungen zur neueren Sprachand Literaturgeschichte (1903); Zwingliana: Mitteilungen zur Geschichte Zwingli and der Reformation (1897).
Luther, for instance, would not tolerate Zwingli's view on the Lord's Supper, while Zwingli was willing to fraternize with him notwithstanding this difference."