somethingtodowithpotter:

I think the best case that Rowling made for her canon pairings was the scene where they first encounter the Veil in the Department of Mysteries.

Harry is immediately drawn to it, of course, hearing the call of the dead. Hermione, who has repeatedly been able to resist the charm of mysticism and grounds herself in logic and rationality, insists that she can’t hear anything and that there isn’t anyone there (both of them are right, of course, in a way).

But here’s the trick: Ron doesn’t seem impacted either. He just says “I’m right here, mate.” And is able to help Hermione get their friends away. (And it isn’t the first time. Ron also demonstrated immunity to the charm of psychological magic as early as their first year when he recognized the Mirror of Erised as a dangerous influence.)

But Ginny is a different story. In front of the Veil Harry, Neville, and Luna all stand entranced. None of them is a surprise, they have all had to deal with death and lost people too soon, so one can argue it’s their loved ones they are hearing. But Ginny is also captivated and needs to be dragged away.

Why her? Well, her susceptibility to the mystic has been long established. She opens her mind and becomes possessed by Riddle in her first year. She recognizes the danger of the music box’s noise and is the one to slam it shut. It’s not a weakness, but rather a way of thinking and feeling the world and one that she has learned how to balance and control (arguably better than Harry).

So the lines become clearly drawn. Ron and Hermione, despite their differences, are both grounded in realism. Harry and Ginny are more open to the unseen, almost spiritual quality of magic and the possibilities of things beyond this world. 

In one subtle scene, Rowling proves that the best indicator of a good match is not necessarily in the obvious, outward show, but rather in the subtleties of how our minds work, how we see the world, and how compatible those mechanisms are.