The paper gives a model of the sentences that express the core of the doctrine of the Trinity. The new elements in the model are: 1) an underlying map between "Divine Person" and "God"-- in place of set- theoretic inclusion, and 2) the notion of a predicable keeping or not keeping phase in a system of kinds. These elements, which are explained in the text, are common in everyday language. The model requires no tampering with the fundamental laws of logic, (...) nor does it require the use of any such difficult metaphysical notions as substance and essence as distinct from person. (shrink)