In his Brevis explicatio (Lyons, 1562) of the prologue to St John's Gospel he already attributes to Christ an official, not an essential, deity – already an anti-Trinitarian position; and in a letter of 1563 rejects the immortality of the soul in favour of Christian mortalism; a position subsequently developed in his disputation with the humanist Francesco Pucci.
Several mediation attempts failed, such as the disputation of Baden in 1526.
The subject of his disputation for the degree was a refutation of the new ideas of the Reformation emerging from the Continent, in particular the doctrines of Philipp Melanchthon.
At the University of Copenhagen, he appears in 1604 as a student and in 1608 as a responder in a disputation, which was held by Professor Hans Jensen Alanus at the University.
After a disputation meeting with four hundred and fifty persons participating, including pastors from Bern and other cantons, theologians from outside the Confederation such as Martin Bucer and Wolfgang Capito from Strasbourg, Ambrosius Blarer from Constance, and Andreas Althamer from Nürnberg, Bern counted itself as a canton of the Reformation.
Later, for six years, he served as senior chair of theology at the University of Dillingen, where he disputed with Protestants and worked with the Bishop of Augsburg to establish a Catholic academic stronghold.
In June 1560, he participated in a disputation with Saxon Lutherans from the court of John Frederick II on the Lord’s Supper, chiefly against Johann Stössel.
The Trial of the Talmud is one of a series of disputations that took place in Europe during the Middle Ages, a group of rabbis were called upon to defend the Talmud.