But the danger that we invite into our lives can come in the most unthreatening shape, the most pedestrian: the cellphone you press against your head, transmitting the voice of your mother, pouring radiation into your brain day after day; the little tick bite in the garden that leaves you aching and palsied for years. It can come in the form of an email from an old lover whom you have not spoken with for many years, which you receive when you are back at the lodge, sitting under a thatched roof drinking a cup of milky tea. It can come when, instead of writing to the person with whom you share
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