Harry witnessed Professor McGonagall walking right past Peeves who was determinedly loosening a crystal chandelier and could have sworn he heard her tell the poltergeist out of the corner of her mouth 'It unscrews the other way.

Your devotion is nothing more than cowardice. You would not be here if you had anywhere else to go.

Many prefer not to exercise their imaginations at all. They choose to remain comfortably within the bounds of their own experience, never troubling to wonder how it would feel to have been born other than they are.

Of all the trees we could've hit, we had to get one that hits back.

The best of us must sometimes eat our words.

For instance, this new idea that You-Know-Who can kill with a single glance from his eyes. That’s a basilisk, listeners. One simple test: Check whether the thing that’s glaring at you has got legs. If it has, it’s safe to look into its eyes, although if it really is You-Know-Who, that’s still likely to be the last thing you ever do.

And sure enough, in seeking to become superhuman this foolhardy young man renders himself inhuman. The heart that he has locked away slowly shrivels and grows hair, symbolising his own descent to beasthood.