The passage describes a surreal and disorienting experience of walking through a foggy canyon. As the narrator and their companion descend, visibility is severely limited, with the fog obscuring everything both in front and behind them. This creates a sense of being trapped in a void, where the familiar is entirely lost, evoking feelings of isolation and confusion.

The imagery of being in a "capsule between amnesias" suggests a profound sense of detachment from time and place. It emphasizes the idea of existing in a moment that is both ephemeral and impactful, where the fog serves as a metaphor for memory and the unclear perception of reality. The weight of the obscured surroundings deepens the emotional resonance of this experience, highlighting the fleeting nature of existence and awareness.