How does the author use foreshadowing in I Have No Mouth, and I Must Scream?

When Ted speaks of AM's "miracles" and the torments which he "visited down on us," and their passage through "a valley of obsolescence", it foreshadows the Bunyanesque tone of the later passage, which reads:

And we passed through the cavern of rats.

And we passed through the path of boiling steam.

And we passed through the country of the blind.

And we passed through the slough of despond.

And we passed through the vale of tears.