In Beverly Cleary's "Emily's Runaway Imagination," the quote highlights the contrast between appearance and strength. It describes a character whose skinny arms may seem weak but are surprisingly strong, similar to rubber bands that can stretch and withstand tension. This suggests that physical looks can be deceiving, and strength isn't solely determined by size or outward appearance.

The quote emphasizes themes of inner strength and resilience, implying that even those who appear fragile or unassuming may possess unexpected power. It encourages readers to look beyond surface impressions and recognize the hidden qualities that define a person's true strength and capability.