“We regulate each other’s nervous systems,” says the neuroscientist Lisa Feldman Barrett in this chapter of “Mosaic Mosaic.” “We are the caretakers of each other’s nervous systems.” So feeling—and thinking—and the regulations of law join together; the idea that laws exist apart from our nervous systems, our feelings, doesn’t quite work, in this sense.

The poet Peter Cole here describes an emotional state associated with the language of rules and ritual in the Hebrew Bible, and in Leviticus particularly. He says, “I was just totally spellbound by the choreography of sacrifice.” And the novelist Joshua Cohen speaks of living law, a kind of vital legal system that emanates beyond the Torah, through commentary and debates ever after.

Laws, rules, rituals: these, you’ll hear, are all alive with feeling. “Regulation doesn’t mean damping down,” Lisa Feldman Barrett says. “It just means coordinating and making something happen.” Poet and critic Elisa Gabbert describes poetry as “a vibration,” which in a way might match the nervous-system correspondence described by Lisa Feldman Barrett. In literature as in legal regulation, we learn in this chapter, language coordinates responses, and it participates in the merging of thought with emotion.

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