Words--"Profession"

 One thing I got from my reading of "The Light Ages" is the etymology of "profession".   The source at the link doesn't say, but I'm guessing that the progression was from a "profession of faith", meaning a solemn vow of belief, which would have been required of Catholics, particularly those entering monasteries and becoming monks.  Given the evolution of universities from monastic and church schools where it seems that monks, or aspirants, were the dominant (only?) students and then teachers, the term becomes applied to the legal, medical, and theological professions.