How does the author use foreshadowing in the novel, What I Really Think of You?

The critical events taking place on the Sunday when things came to a startling conclusion are all foreshadowed in the accounts narrated by Opal and Jesse. Opal has a recurrent and strange night dream that she does not share with anyone, but she believes that it has some spiritual significance. Opal believes that she has been "saved" but admits that she has never really felt The Power and never "got slain in the spirit." Opal believes in, and looks forward to, The Rapture, which she does not fully understand. She suspects, however, that if she should attain The Rapture it would redeem her in the views of the peers who have taunted her about her religion. Opal talks often about The Rapture. "When The Rapture comes" she says at one point, "everybody'll be kissing all over the place . . . and it will be all right to do it." The reader is well prepared to view events that happened to Opal on that Sunday as credible and believable.