None of the persons seeks his own; none seeks to know himself in isolation. Irreducibly different as they are, they are entangled in an eternal knot of perfect communion. Widespread as this notion is in trinitarian theology, it can seem a pointless exercise in mystery-mongering. As if confessing that the Christian God is both Three and One didn’t put enough strain on rationality, Christians have to add that each of the three is indwelled by and indwells, contains and is contained by, each of the