I believe that Quirrel, being the overeducated ruthless genius that he is, has already understood Harry’s revelation, but has his own obstacles to casting human patronus, some that are not so easily overcome. For one, he may already be a bit too dead.
I believe that Quirrel, being the overeducated ruthless genius that he is, has already understood Harry’s revelation, but has his own obstacles to casting human patronus, some that are not so easily overcome. For one, he may already be a bit too dead.