Is there a moment in history when a work receives its ideal interpretation? Or is negotiation always required to preserve the past and accommodate the present? The freedom of interpretation, Charles Rosen suggests in these sparkling explorations of music and literature, exists in a delicate balance with fidelity to the identity of the original work. Rosen cautions us to avoid doctrinaire extremes when approaching art of the past. To understand Shakespeare only as an Elizabethan or Jacobean theatergoer would understand him, or to modernize his plays with no sense of what they bring from his age, deforms the work, making it less ambiguous and inherently less interesting. For a work to remain alive, it must change character over time while preserving a valid witness to its earliest state.