Which of Martin Luther’s disagreements with the Catholic Church do you think were most influenced by the Renaissance idea of humanism? Why?

The rallying cry of Renaissance humanism was "Ad fontes!" or "Back to the sources." Renaissance thinkers consciously returned to the treasures of classical learning for inspiration, seeing them as examples to be imitated in a variety of human endeavors, including everything from art and architecture to poetry and political philosophy.

Luther was himself influenced by the humanist veneration of antiquity. However, antiquity for him meant primitive Christianity and the sources he went back to were...

The rallying cry of Renaissance humanism was "Ad fontes!" or "Back to the sources." Renaissance thinkers consciously returned to the treasures of classical learning for inspiration, seeing them as examples to be imitated in a variety of human endeavors, including everything from art and architecture to poetry and political philosophy.

Luther was himself influenced by the humanist veneration of antiquity. However, antiquity for him meant primitive Christianity and the sources he went back to were the Holy Scriptures. In his principle of sola scriptura, Luther insisted that the ultimate truth of things lay in the Bible and nowhere else. Individual Christian believers should interpret the word of God for themselves, instead of relying on the Church to do it for them.

In their privileging of pagan thought, Renaissance humanists often sought to bypass the authority of the Church; they shared with Luther a total disdain for the scholastic philosophy used to provide intellectual support for that authority. However, they still venerated human thought; for Luther, sole authority was vested in the word of God as interpreted by the individual believer.