"But he was more than a tactical commander of bravery and genius. He was reflective. He evolved from his own experience and observations solderly lessons which he committed to paper and from which all learned and continue to learn. Wherever he went, as has been remarked, he taught; and he teaches still. Rommel was not only a master practitioner; he deduced theory from practice and the military art benefited therefrom."
January 1, 1970
https://en.wikiquote.org/wiki/Erwin_Rommel