Sagittarius and Pisces share the Mutable modality, meaning both signs are built for adaptation, transition, and following where inspiration leads — but they channel this flexibility through opposing elements. Sagittarius runs on Fire: directional, expansive, and fuelled by visible truth. Pisces operates through Water: receptive, diffuse, and attuned to invisible currents. When Fire meets Water, neither destroys the other outright, but each dilutes the other's intensity — Steam is produced, creating a dynamic that is imaginative and idealistic, yet chronically lacking in follow-through. The double-Mutable quality amplifies this: both signs shift position readily, which breeds remarkable open-mindedness but also a relationship that can drift without a defined anchor. Jupiter rules Sagittarius natally and traditionally co-rules Pisces, giving both signs a genuine hunger for meaning, expansion, and the transcendent — this shared Jupiter thread is the real connective tissue between them.