Martin Luther on Scripture and the heretics
“Anybody who wishes to be a theologian must have a fair mastery of the Scriptures, so that he may have an explanation for whatever can be alleged against any passage. That is to say, he must distinguish between law and gospel. If I were able to do this perfectly I would never again be sad. Whoever apprehends this has won."
“Whatever is Scripture is either law or gospel. One of the two must triumph: the law leads to despair, the gospel leads to salvation. I learn more about this every day, and Duke George could too. The gospel is life. The pope drove me to this; he opened my eyes to it. It is as Augustine said to himself: the heretics provoke us to search the Scriptures. Otherwise nobody would think about them.”