It has often been noticed that Plato's metaphysical view of being is dipolar. The purpose of the present article is to detail what it means to say that being is dipolar in Plato. Further, I will explore the extent to which dipolarity in Whitehead is indebted to Plato and the extent to which Whitehead's dipolarity is different from Plato's. In this regard I will concentrate on Whitehead's recently published Harvard Lectures.