exhortation, discussion, teaching, homily, instruction, discourse, treatment, doctrine, sermon.
Desgenettes might very well have been applied to him: as he did not believe himself to have any mission to lead others to his opinions, he limited himself to preaching
It is always the habit of a Tory to suppose that popular discontent is a matter of preaching.
I think the city itself is preaching
the best sermon all the time.