Martin Luther took on the might of the church of his time. What happened next would prove revolutionary for the Christian church and its future growth.
Martin Luther continues to plow into the opposition, it will end badly for one of them!
Should the church be allowed to dictate how you should think on spiritual matters? In Luther's day those who thought not protested that the authority of the Bible and the freedom of conscience should be above the tradition of the church.
Calvin was an acclaimed a defender of Christianity, but he had opposition along the way, some undeserved, some self-inflicted.