Sorry means you feel the pulse of other people's pain as well as your own, and saying it means you take a share of it. And so it binds us together, makes us trodden and sodden as one another. Sorry is a lot of things. It's a hole refilled. A debt repaid. Sorry is the wake of misdeed. It's the crippling ripple of consequence. Sorry is sadness, just as knowing is sadness. Sorry is sometimes self-pity. But Sorry, really, is not about you. It's theirs to take or leave.
