[1] He matriculated at the University of Erfurt in 1436 to study law as Johannes Bremer von Hagen.
In 1465 he returned once more to Erfurt, this time as a simple monk, where he dedicated himself for the rest of his life to theological study and writing.
[2] Johannes acted as an advisor in theological and legal matters to bishops, princes and scholars.
[2] He opposed abuses in ecclesiastical life and was a champion of the reform of the church and religious orders.
His written commentaries on the text of the Bible comprise 80 volumes, but the greater part of his writings were not printed.