In a show full of clever one-liners, Buffy's writers saved some of the best for Marsters — who can forget the timeless “Out. For. A. Walk. Bitch.”? — but Spike's best quote is from the series finale, “Chosen.” It marks the natural endpoint for a character who’s been tugged between heroism and selfishness throughout his entire run. It’s also the definitive Buffy and Spike moment, with Spike rejecting Buffy’s offer of comfort for the truth.