Howard and Shirley were clothed, always, in an invisible layer of decorum that they never laid aside.

Don’t put your wand there, boy! ... Better wizards than you have lost buttocks, you know!

The only reason to delay at this point was because the immediate prospect was so deeply uninviting.

The wand chooses the wizard.

The spells are made up. I have met people who assure me, very seriously, that they are trying to do them, and I can assure them, just as seriously, that they don’t work.

Whatever happens to your body, your soul will survive, untouched.

Yes, it is easy to see that nearly six years of magical education have not been wasted on you, Potter. Ghosts are transparent.