The juxtaposition of the views of Leibniz and Berkeley indicate how the very points mistakenly cited to differentiate them are clarified precisely by appreciating their similarities, particularly in terms of understanding how minds differentiate and relate bodies. Such a strategy is especially useful for understanding how their accounts of perception, substance, and contingency depend on their mutual commitment to the harmony of all things and on their sensitivity to distinguishing the different domains of natural philosophy and metaphysics.