How does the author use foreshadowing in Confessions of Zeno?

Zeno's preamble foreshadows several major ideas from the book. In one of these instances, Zeno hints that he has become his father, when he says that he feels that he has dreamed some important truth but forgotten it. This is basically what Zeno's father says to him before dying. This suggests that Zeno, too, will soon die.