Like so many who have survived American post-graduate education in philosophy, I entered the academy having neither formal training in teaching nor writing. (Oh, as I see it, taking a few college courses on composition and literature does not count as a means to avoiding dull prose.) I became a teacher by imitating my professors and through trial and error; I developed as a scholar, and only secondarily as a writer, through countless comments given to me during seminars and office visits, as well as in the margins of my papers. Yes, marginalia, the holy grail of insight!
Conces, Rory J., "Bokrecension" (2013). Philosophy Faculty Publications. 19.