The quote reflects the lingering effects of emotional or physical trauma, illustrating how wounds can scab over but not entirely heal. The metaphor of a knife suggests deep pain that can resurface unexpectedly, catching one off guard. This experience highlights the complexities of healing, where moments of forgetting are often interrupted by sudden reminders of past suffering.

In "Pushing the Limits" by Katie McGarry, the message underlines the theme that trauma can alter a person permanently. The protagonist grapples with these reminders, which indicate that while time may lessen the immediacy of pain, it doesn't erase the scars. The journey of healing is depicted as ongoing, filled with challenges that shape one's identity and experiences.