"People are in one of two states in a relationship,” Gottman went on. “The first is what I call positive sentiment override, where positive emotion overrides irritability. It’s like a buffer. Their spouse will do something bad, and they’ll say, ‘Oh, he’s just in a crummy mood.’ Or they can be in negative sentiment override, so that even a relatively neutral thing that a partner says gets perceived as negative."

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So this is supposed to be about the how, and when, and why, and what of reading -- about the way that, when reading is going well, one book leads to another and to another, a paper trail of theme and meaning; and how, when it's going badly, when books don't stick or take, when your mood and the mood of the book are fighting like cats, you'd rather do anything but attempt the next paragraph, or reread the last one for the tenth time.

— Nick Hornby