In this passage from "Twilight", the speaker expresses deep concern for Bella's well-being. He emphasizes her fragility and the immense care he must take in their interactions to avoid causing her unintentional harm. This highlights his awareness of her vulnerability and the seriousness of their relationship.
The intensity of his feelings is underscored by the imagery of potential violence, illustrating the contrast between his love and her delicacy. He acknowledges the ease with which he could hurt her if he were to lose focus, reinforcing the theme of protection and the weight of his responsibility toward her in their complex dynamic.