Eclipse explores the complexity of love and the struggle to define true love. The characters find love connected to many emotions. Some are positive, others are negative. Edward and Jacob's love for Bella, for example, inspires them to forge an unlikely alliance between vampires and werewolves who, until then, considered themselves mortal enemies. At the same time, Bella acts selfishly in putting off her choice between Edward and Jacob, because she's in love with them both. In the end, though, the foundation of true love seems to lie in choosing to make a commitment to one person.