Having been brought up in the Lutheran faith, he nevertheless questioned its teachings, something which became a burning issue when confronted with Roman Catholicism while studying in Florence.
Setelah dibesarkan dalam kepercayaan Lutheran, ia langsung mempertanyaakn ajaran-ajarannya, sesuatu yang kelak menjadi masalah besar ketika berkonfrontasi dengan Katolik Roma ketika belajar di Firenze.