thus it follows that matter, and in general every thing belonging to the world, is not suited to the idea of a necessary original being as a mere principled of the greatest empirical unity, but this must be posited outside the world, since then we can always be con fident of deriving the appearances of the world and their existence from others, as though there were no necessary being, and nevertheless we can strive ceaselessly toward completeness in this derivation, as though such a being were presupposed as a highest ground.