What is the author's tone in Comics and Sequential Art by Will Eisner?

In Comics & Sequential Art Will Eisner is both a subjective champion of comic book art as a serious form of communication and important art form and an objective analyst of the component parts and underlying psychology. He is at his best in the brief notes in the gutters beside reproductions of his comics, which explain why he does what he does on the given page and what he expects the impact will be on reader/viewers. The student or practicing artist can glean much valuable information from the notes and from a minute study of the drawings.