It really depends on what body of Luther&#x27;s output you&#x27;re referencing - Luther as a rather acerbic German man swore and cussed a lot and used all sort of sources for political arguments.<p>Luther in his output that he would have felt as proclaiming the Gospel, primarily used scripture and early church fathers as the norm. In the Christian tradition, scripture is God-breathed and is a primary source (along with tradition that has been handed down.)