The document discusses the importance of consistency in magazine covers for defining a publication's identity. It states that a magazine's cover represents its personality and differentiates it from competitors. Consistent covers within guidelines build this personality and identity over time. While creativity is valued, guidelines should not be compromised at the cost of consistency. Maintaining consistency provides readers with clear expectations and allows the magazine to be easily identified even among similar publications. Losing consistency through inconsistent covers can cause a magazine to blend in and lose its mindshare in its genre.