The New Intolerance - Mary Eberstadt ("That cathedral is known as Chartres. One of the outstanding examples of Gothic architecture on earth, it was built up by men and women who had witnessed the signature disaster of their times—and who refused to resign themselves to it.")
Phoebe asks Rachel not to use her massage certificate to a massage chain because she feels that those chains put people like her out of business. Phoebe doesn't tell Rachel that she actually works for the chain herself. When Rachel goes anyway, Phoebe pretends to be someone else.