How does the author use foreshadowing in Forged by Fire?

There's an important piece of foreshadowing in chapter two. When Aunt Queen is rocking Gerald while he's in the hospital, Gerald is crying. The author points out that Gerald is crying for all the pain he's already endured and "for all the pain yet to come." This use of foreshadowing is a common technique in this book and is typically dark, indicating something bad that is about to happen.