Cats were often familiars to workers of magic because to anyone used to wrestling with self-willed, wayward, devious magic--which was what all magic was--it was rather soothing to have all the same qualities wrapped up in a small, furry, generally attractive bundle that...might, if it were in a good mood, sit on your knee and purr. Magic never sat on anybody's knee and purred.
The quote highlights the connection between cats and magic, suggesting that both possess unpredictable and capricious qualities. For those who engage in magical practices, having a cat as a companion can be comforting. Cats, with their charming demeanor and affectionate habits, provide a sense of companionship that is often lacking in the chaotic realm of magic. Unlike the often tumultuous nature of magic, a cat's purr offers a soothing presence that can ease the mind.
This relationship implies that the comfort derived from a cat's companionship can be grounding for those who work with the unpredictable forces of magic. While magic can be challenging and requires significant skill, the simple act of a cat sitting curled up on a lap evokes warm feelings and a sense of peace, balancing the complexities of a magic-filled life.