I am convinced that [Rear Window] is one of the most important of all the seventeen Hitchcock has made in Hollywood, one of those rare films without imperfection or weakness, which concedes nothing. For example, it is clear that the entire film revolves around the idea of marriage. When Kelly goes into the suspect's apartment, the proof she is looking for is the murdered woman's wedding ring; Kelly puts it on her own finger as Stewart follows her movements through his binoculars from the other side of the courtyard. But there is nothing at the end that indicates that they will marry. Rear Window goes beyond pessimism; it is really a cruel film. Stewart fixes his glasses on his neighbors only to catch them in moments of failure, in ridiculous postures, when they appear grotesque or even hateful.

The film's construction is very like a musical composition: several...