"I would like to spare the time and effort of hack reviewers and, generally, persons who move their lips when reading"

This quote by Vladimir Nabokov is a commentary on the lack of respect for literature and the composed word. He is revealing his ridicule for those who do not put in the time to check out and appreciate literature, but rather simply skim through it or read it without any idea or understanding. He is recommending that these people are squandering their time and effort, as they are not getting the full advantage of the work. He is likewise suggesting that these individuals are not offering the author the regard they deserve, as they are not taking the time to really appreciate the work. By using the term "hack customers", Nabokov is recommending that these people are not taking the time to effectively evaluate the work, but instead are just giving it a general glimpse. He is also suggesting that these individuals are not engaging with the text, but instead are simply moving their lips when reading, as if they are not genuinely understanding what they read. In general, Nabokov is revealing his frustration with those who do not make the effort to genuinely appreciate literature.