Luther on how trials made him a theologian:

I didn’t learn my theology all at once, but have had to probe more and more deeply. My temptations led me to do this because no one can understand Holy Scripture without practical experience and trials. This is why Paul had to put up with a devil that beat him with his fists and, by means of these temptations, drove him diligently to study the Holy Scripture. In a similar way, I have the Pope, the universities and all the scholars and through them the Devil himself at my throat. They are the ones who chased me into the Bible, causing me to read it conscientiously and thus to attain a true interpretation of Holy Scripture. if we don’t have this kind of Devil we are only speculative theologians who have trouble working out their own thoughts and who speculate with mere reason.

Luther Brevier, p218