"Here is the issue in plain words.

All that I did for you at Wittenberg, I should have done in any case for the sake of our friendship.

Your freedom would probably never have been granted to me but for my mission, although even that I might have tried to arrange.

I brought your letters here, and I traded them with your sister and Miss Fairclough for the shelter of their hospitality and their guarantees.

Now you know just where friendship ended and the other things began.