God, Existence, Proof, Explanation

The appearance of the proposition that God necessarily exists, among the Definitions at the outset of the Ethics, might be taken as an indication that Spinoza is circumventing its proof, because he disagrees with Descartes and others that the entity named by 'God' is absent in some respect.  However, to the contrary, he does recognize that the existence of his Deity is not immediately evident in ordinary experience, except that he diagnoses that condition non-traditionally.  On his analysis, his Deity is ever-present, but is not perceived as such because of a pervasive misunderstanding of what constitutes it.  Thus, what he offers is an explanation of what the concept of Deity entails, including, notably, that it is 'natura naturans', i. e. Nature creating itself, an ever-present, immanent process.  On that basis, a correct understanding of it can dispel any doubts that that Deity exists, is Spinoza's tack..