'There is a story my father tells me, of what he noticed when he dropped me off at a horse-riding camp when I was seven. It cost $100, and I remember that distinct lump of guilt when I thanked him – a lump that I came to assign to a larger, more unnameable debt. The word we so often use to describe this is sacrifice, which can sound so blunt, so kitsch. I’m thinking about my friend, who tells me her parents rely on sacrifice to show her their love. It’s not love, she says, when it’s not what you want them to do. I had never thought of this before, the idea of sacrifice as something we ask for. Somehow, I don’t think my parents would agree with it. They wouldn’t see generosity towards their children as a choice, as a deliberation of weighing up the pros and cons – more like something that compels, that moves them through space.' (Introduction)