You are here to learn the subtle science and exact art of potion-making. As there is little foolish wand-waving here, many of you will hardly believe this is magic. I don't expect you will really understand the beauty of the softly simmering cauldron with its shimmering fumes, the delicate power of liquids that creep through human veins, bewitching the mind, ensnaring the senses. . . I can teach you how to bottle fame, brew glory, even stopper death — if you aren't as big a bunch of dunderheads as I usually have to teach.

Hearing voices no one else can hear isn't a good sign, even in the wizarding world.

Well, that was a bit stupid of you,” said Ginny angrily, “seeing as you don’t know anyone but me who’s been possessed by You-Know-Who, and I can tell you how it feels.” Harry remained quite still as the impact of these words hit him. Then he turned on the spot to face her. “I forgot,” he said. “Lucky you,” said Ginny coolly. “I’m sorry,” Harry said, and he meant it.

I had the idea of a boy who was a wizard and didn't yet know what he was. I never sat down and wondered, "What shall I write about next?". It just came, fully formed.

I will not calm down!

The most important thing is to read as much as you can, like I did. It will give you an understanding of what makes good writing and it will enlarge your vocabulary.

You see what you expect to see, Severus.