Why I'm even worrying about this is a complete moot point. I wasn't going to put more effort into studying than I did last night regardless of whether I'd found out my grade or not. I know the material, to a point. I wouldn't think I'd been successful in the class so far if I didn't. This is why I never studied for tests in high school or even usually in college... if you don't know the material, why even bother? The only possible exception I might make for this would be something like law school where obviously you have to absorb a lot of information and know it by heart, but you also end up studying a lot of obscure shit that holds no relevance. Okay, so maybe I studied for math tests once I got to functions and calc, which I view as holding the same water as obscure legal knickknackery.
Shifting gears, why do we say "by heart" when we mean "by mind"? Any Ts on the Myers-Briggs scale admit to never using this phrase? Maybe we Feeling weenies (yes I just said "feeling weenies") want to think (or feel...) -- to believe so badly in our heart of hearts (!!! there it goes again) -- that when you know something, truly know it, you don't just have it memorized and stored and compartmentalized, but you FEEL IT IN YOUR BONES. Which is a stupid phrase, by the way, because you're not dumping memory into your marrow.