How does the author use foreshadowing in The Poetics of Space?

In the chapter, Intimate Immensity, Bachelard poses the other extreme (contrasting the miniature) that is foreshadowed with the Great Bear constellation. He begins with quiet daydreaming that opens the depths of man to himself. The metaphor of old forests that just seem to go on deeper and deeper without limit is used to represent man's search deep within. The immensity of time and space absorb Bachelard in endless daydreaming.