He was one of the most important figures in the Catholic Counter-Reformation in Germany. His was such a key role that he has often been called the second apostle of Germany in that his life parallels the earlier work of Boniface.
Although Peter once accused himself of idleness in his youth, he could not have been idle too long, for at the age of 19 he received a masters degree from the university at Cologne. Soon afterwards he met Peter Faber, the first disciple of Ignatius Loyola, who influenced Peter so much that he joined the recently formed Society of Jesus.
At this early age Peter had already taken up a practice he continued throughout his lifea process of study, reflection, prayer and writing. After his ordination in 1546, he became widely known for his editions of the writings of St. Cyril of Alexandria and St. Leo the Great. Besides this reflective literary bent, Peter had a zeal for the apostolate. He could often be found visiting the sick or prisoners, even when his assigned duties in other areas were more than enough to keep most people fully occupied.
In 1547 Peter attended several sessions of the Council of Trent, whose decrees he was later assigned to implement. After a brief teaching assignment at the Jesuit college at Messina, Peter was entrusted with the mission to Germanyfrom that point on his lifes work. He taught in several universities and was instrumental in establishing many colleges and seminaries. He wrote a catechism that explained the Catholic faith in a way which common people could understanda great need of that age.
Renowned as a popular preacher, Peter packed churches with those eager to hear his eloquent proclamation of the gospel. He had great diplomatic ability, often serving as a reconciler between disputing factions. In his letters (filling eight volumes) one finds words of wisdom and counsel to people in all walks of life. At times he wrote unprecedented letters of criticism to leaders of the Churchyet always in the context of a loving, sympathetic concern.
At 70 Peter suffered a paralytic seizure, but he continued to preach and write with the aid of a secretary until his death in his hometown (Nijmegen, Netherlands) on December 21, 1597.