Empathy needs both a filter that makes us select what we react to, and a turn-off switch. Like every emotional reaction, it has a “portal,” a situation that typically triggers it or that we allow to trigger it. Empathy’s chief portal is identification. We’re ready to share the feelings of someone we identify with, which is why we do so easily with those who belong to our inner circle: For them the portal is always ajar. Outside this circle, things are optional. It depends on whether we can afford being affected, or whether we want to be. If we notice a beggar in the street, we can choose to
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