Anfechtung

Moreover, I want to point out to you a correct way of studying theology, for I have had practice in that. If you keep to it, you will become so learned that you yourself could (if it were necessary) write books just as good as those of the fathers and councils, even as I (in God) dare to presume and boast, without arrogance and lying, that in the matter of writing books I do not stand much behind some of the fathers. Of my life I can by no means make the same boast. This is the way taught by holy King David (and doubtlessly used also by all the patriarchs and prophets) in the one hundred nineteenth Psalm. There you will find three rules, amply presented throughout the whole Psalm. They are Oratio, Meditatio, Tentatio. Prayer, and meditation, Anfechtung. –Martin Luther