Is authority to be placed in human wisdom or cultural experience, or is it to be located in an incommensurable divine revelation that intrudes into our world from the beyond? Does it lie within the compass of what we can ordinarily discover or conceive, or does it break into our world as a new reality that overturns human imagination and conception? Is it a truth waiting to be uncovered through diligent searching, or is it a word personally addressed to us, calling us to repentance and obedience?