I know this is completely outta sync with what you were going for, but I couldnt resist quoting good ol’ rational Quirell:
There was a half-smile on Professor Quirrell’s face as he replied, “Not really, Miss Davis. In truth I do not care about that sort of thing in the slightest. But it is futile to count the witches among Ministers of Magic and other such ordinary folk leading ordinary existences, when Grindelwald and Dumbledore and He-Who-Must-Not-Be-Named were all men.” The Defense Professor’s fingers idly spun the button, turning it over and over. “Then again, only a very few folk ever do anything interesting with their lives. What does it matter to you if they are mostly witches or mostly wizards, so long as you are not among them? And I suspect you will not be among them, Miss Davis; for although you are ambitious, you have no ambition.”
“That’s not true! ” said Tracey indignantly. “And what’s it mean?”
Professor Quirrell straightened from where he had been leaning against the wall. “You were Sorted into Slytherin, Miss Davis, and I expect that you will grasp at any opportunity for advancement which falls into your hands. But there is no great ambition that you are driven to accomplish, and you will not make your opportunities. At best you will grasp your way upward into Minister of Magic, or some other high position of unimportance, never breaking the bounds of your existence.”
I know this is completely outta sync with what you were going for, but I couldnt resist quoting good ol’ rational Quirell: