He was born at Meslin L'Eveque near Ath in Hainaut as Michel De Bay, the son of Jean de Bay, a farmer. Baius studied humanities in
Brugelette and in
Enghien and in 1533, he began studying philosophy at the Grand College het Varken of
Leuven University. From 1535, he also studied theology at the
Pope Adrian VI College. He was an excellent student and was ordained a priest in 1542, and was appointed director of the
Standonck-College in Leuven. In 1544, Baius obtained his doctorate in philosophy and became a teacher at the College het Varken. In 1549, Baius was appointed professor of scholastic philosophy. The following year, Baius also obtained a license in theology and became president of the College Adrian, and also substituted for the professor of Holy Scripture, who was then absent at the
Council of Trent. From February to August 1553, he was the rector of the university. Baius had very early formed a close friendship with
Jean Hessels. While Chancellor
Ruard Tapper and
Josse Ravesteyn, Professor of Theology were at the Council of Trent, Baius and Hessels took the occasion to introduce new methods and new doctrines. They believed that Catholic apologists were seriously handicapped by their reliance on the authority and methods of the Scholastics, and that if instead of appealing to the writings of St. Thomas as the ultimate criterion of truth they were to insist more on the authority of the Bible and of the works of the Early Fathers, such as St. Cyprian, St. Jerome, and St. Augustine, they would find themselves on much safer ground, and their arguments would be more likely to command the respect of their opponents. On his return from Trent in 1552, Tapper asked
Cardinal de Granvelle,
archbishop of Mechelen, to intervene. Granvelle succeeded in quieting the innovators for a while. Baius's theories were very popular with theology students who spread it further. This was met with much opposition, and around 1558, later Cardinal
Antoine Perrenot de Granvelle and
Viglius tried unsuccessfully to persuade Baius to make some adjustments to his positions. However, in 1560, at the request of the
Franciscans, the Sorbonne condemned 18 of his statements. Baius answered the censure in a memoir now lost, and the controversy only increased in acridity.
Pope Pius IV, through Cardinal Granvelle, imposed silence upon both Baius and the Franciscans, without, however, rendering any doctrinal decision. == Career ==