Of course the ordinands already had the knowledge acquired from their university courses.

But many things were completely new to them, for example the daily practice of meditation. Every morning after breakfast they were asked to think reflectively, alone for half an hour, on a text from Luther’s Bible. each text was set for a whole week of daily meditation.

(Ferdinand SchlingensiepenDietrich Bonhoeffer 1906-1945: Martyr, Thinker, Man of Resistance, 181).