"Angelus: Now that's everything, huh? No weapons... No friends...No hope. Take all that away... and what's left? Buffy: Me."

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Smell is the most powerful trigger to the memory there is. A certain flower, or a-a whiff of smoke can bring up experiences long forgotten. Books smell musty and-and-and rich. The knowledge gained from a computer is a... it, uh, it has no-no texture, no-no context. It's-it's there and then it's gone. If it's to last, then-then the getting of knowledge should be, uh, tangible. It should be, um, smelly.

— Joss Whedon