That is one thing I've learned, that it is possible to...

That is one thing I've learned, that it is possible to really understand things at certain points, and not be able to retain them, to be in utter confusion just a short while later. I used to think that once you really knew a thing, its truth would shine on forever. Now it's pretty obvious to me that more often than not the batteries fade, and sometimes what you knew even goes out with a bang when you try to call on it, just like a lightbulb cracking off when you throw the switch.