Guido Reni Girl with a Rose painting

Guido Reni Girl with a Rose paintingGuido Reni Angel of the Annunciation painting
Harry was going to have to take Slughorn's word for it that Golpalott's Third Law was true, because he had not under-stood any of it. Nobody apart from Hermione seemed to be following what Slughorn said next, either.
'... which means, of course, that assuming we have achieved correct identification of the potion's ingredients by Scarpin's Revelaspell, our primary aim is not the relatively simple one of selecting antidotes to those ingredients in a
of themselves, but to find that added component which will, by an almost alchemical process, transform these disparate elements -'
Ron was sitting beside Harry with his mouth half-open, doodling absently on his new copy of Advanced Potion-Making. Ron kept forgetting that he could no longer rely on Hermione to help him out of trouble when he failed to grasp what was going on.