One thing I am reading out of this is that Quirrell is (understandably) genuinely worried about what Harry might do, after the Prophecy.
Part of this is making him dependent on Quirrell for information, obviously, but part of this also seems to be a genuine desire to keep certain knowledge out of his hands—I’m 90% sure that the stock answer Vector and Flitwick will tell Harry about spell creation is the same one that Quirrell just gave, for example.
One thing I am reading out of this is that Quirrell is (understandably) genuinely worried about what Harry might do, after the Prophecy.
Part of this is making him dependent on Quirrell for information, obviously, but part of this also seems to be a genuine desire to keep certain knowledge out of his hands—I’m 90% sure that the stock answer Vector and Flitwick will tell Harry about spell creation is the same one that Quirrell just gave, for example.