Since Augustine, western medieval thinkers have largely identified ‘simplicity’ as the most fundamental feature of the divine nature. Although the western tradition of thinking about God has often been regarded as relatively continuous, I will demonstrate in this paper that a separate line of thought developed amongst early thirteenth-century Franciscan thinkers. This new tradition stressed God's immensity or infinity. In doing so, I will argue, it instigated a fundamental shift in the way of conceiving the nature of God that holds profound promise for reconciling factions in systematic theology today, particularly between classical theists and panentheists.
