How is our imaginative grasp of what it takes to live together related to our rational understanding of the same issue? Spinoza argues that, while theology draws on imagination to clarify the content of the divine law—‘love your neighbour’—the same recommendation is independently echoed in our philosophical understanding of the value of a cooperative way of life. Some commentators have argued that philosophy, thus conceived, is the preserve of an elite, whereas theology is aimed at the masses. Drawing on Cicero’s analysis of honestum, and Spinoza’s use of it, I challenge this view. A theologically grounded way of life, as Spinoza presents it, creates the political and epistemological conditions for a gradual transition to philosophical understanding, so that theology and philosophy, like imagining and reasoning, are in practice inseparable.