Oh, Severus

Hermione: Don't do the thing, Harry!

Ron: Let's do the thing, Harry!

Snape: Don't do the thing you dunderheaded ball of deaf ignorance.

McGonagall: Mr. Potter, don't you dare do the thing.

Dumbledore: Hmmm... Perhaps you shouldn't do the thing, but here are some tools, explained in the most vague way possible, to get the thing done, I'm counting on you.

Hagrid: All the details about the thing.

Sirius: James, I mean Harry, back in my school days with James, your father, we always did the thing.

Remus: Sirius, perhaps you shouldn't encourage him, but if you're going to here's a map to help with the thing.

Draco: Potter can't possibly accomplish the thing. Prat.

Luna:We must go at this thing from the side while riding nargles to freedom.

Voldemort: THERE IS NO THING BUT POWER AND THOSE TOO WEAK TO ACCEPT IT!!!