The near-magical transformation of the looking glasses into “completely inert” silica and the unresolved mystery of the heptapods’ reasons for visiting Earth emphasize the alienness of the heptapods’ technologies and motives. Notably, although learning Heptapod B has made some humans think more like heptapods, their heptapod-like consciousness is not enough to decode the mysteries of the heptapods’ behavior. This detail points to the limits of language’s ability to reshape consciousness. At the same time, though, it’s arguable that the heptapods actually
did give humans useful information, even if the humans technically already knew that information. What the heptapods give back to the humans is essentially common knowledge in translation, but because their language is so different (and because language shapes thought), these translations have the potential to provide new insight into the things humanity has taken for granted.