From a column I clipped by Michael Kelly, on why saying something well doesn't make it true:

All happy families resemble one another, but each unhappy family is unhappy in its own way? No, that is exactly wrong. Happy families are wildly, even eccentrically, diverse. But in every unhappy family, as any social worker can tell you, you will likely find the same dreary woes: dead love, physical or psychological brutality, alcoholism, infidelity, poverty.