“When we attend to someone who greets us, it is not to require confirmation, attestation, certification of our identity. To respond to someone who greets us is to drop our concerns and thoughts, and expose ourselves to her. It is to expose ourselves to questioning and judgment. Simply responding to her greeting is to recognize her rights over us. Each time we enter into conversation we expose ourselves to being altered or emptied out, emptied of our convictions, our expectations, our memories.”