In Twilight, the first novel in the saga, Bella Swan has just moved to Forks, Washington to live with her father. This is where her adventures begin with Edward Cullen, particularly when Bella learns that Edward and the Cullens are actually vampires.
"When life offers you a dream so far beyond any of your expectations, it’s not reasonable to grieve when it comes to an end." ~Bella Swan, Twilight, Preface, p.1
Who hasn't gotten their hopes up when a great opportunity presents itself, then slips out of their grasp? Surely, everyone has experienced such disappointment at some point in their lives. Still, Bella is warning us not to get our hopes up when something seems too good to be true.
"It was nice to be alone, not to have to smile and look pleased; a relief to stare dejectedly out the window at the sheeting rain and let just a few tears escape." ~Bella Swan, Twilight, Chapter 1, p.9
It is easy to relate to what Bella is feeling in this sentence. Everyone needs time alone every once in a while. Take some time to grieve or to let the tears flow when things get to be too much.
"Only you could get into trouble in a town this small. You would have devastated their crime rate statistics for a decade, you know." ~Edward Cullen, Twilight, Chapter 8, p.173
Not only is Bella accident-prone, she is also prone to attracting trouble. This is especially true after she meets the vampire and werewolf families in her new hometown, befriends both and has to choose between the two. Still, without the trouble, there would be no story to the Twilight Saga.