Besides providing a certain level of intellectual entertainment, the primary objective of good adaptation, like that of any good interpretative reading of a text, is to make viewers return to the text and reconsider it anew. Probably the most successful adaptations of literature to film are those which cause the viewer to conclude, after having returned to the text and evaluated the reading that the film has delivered, that the filmmakers have a point, an interpretation which deserves a hearing. This interpretation need not be all-inclusive, for the compressed length of a film does not permit comprehensive coverage, nor does the nature of the medium. However, it must carry insights that together provide a valid understanding of the original text.

The list of points or understandings encompasses all types of insights, many of which are personal. Friedrich Dürrenmatt's Der Richter und Sein Henker (1961) made so enormous an impression on me when I first read it that it is the only book from my college years that I still possess. However, until I saw Maximillian Schell's adaptation of it, End of the Game (1976) – in which the author himself appears – I had no idea just how blackly comic the novel was, most notably the funeral in the rain, whose multiple comic possibilities Schell brings to the screen.