Companies that enjoy enduring success have a core purpose and core values that remain fixed while their strategies and practices endlessly adapt to a changing world. The rare ability to balance continuity and change—requiring a consciously practiced discipline—is closely linked to the ability to develop a vision. Vision provides guidance about what to preserve and what to change. A new prescriptive framework adds clarity and rigor to the vague and fuzzy vision concepts at large today. Managers who master a discovery process to identify core ideology can link their vision statements to the fundamental dynamic that motivates truly visionary companies—that is, the dynamic of preserving the core and stimulating progress.