tinyE: Sounds to me like Clerics are smarter than everyone else. :P They don't need to learn, they already know it. Guess I'll just tell my boy Rasputin to go ahead and sell that crap, he doesn't need them!
I love this game. So much bloodier than the other DD titles. I love those too, but more killing in this one right off the bat. No need to go into some district, just look around, shit to kill. It reminds me of Detroit.
Well, technically, Clerics get all their spells automatically at level up because their gods provide them with their power in exchange for their faith and prayers or at least according to D&D/FR lore; same for Druids, they draw their powers from nature which is all around them, or some such. Wizards and Bards don't necessarily follow any faith, they just simply study the arcane arts, and that's the reason why Clerics/Druids use their WIS for memorising spells and Wizards/Bards use their INT. Holding on to some of the scrolls can be useful, since this way you can free up some spell slots.
Anyway, glad to hear you're having a great time with the game, I've known the Infinity Engine games since I was 12-13, but IWD1 and 2 are the ones that I still get out and play now and then.