2471. These two memories are entirely distinct from each other. To the exterior memory, which is proper to man while he is living in the world, pertain all the words of languages, also the objects of the outer senses, and also the knowledges that belong to the world. To the interior memory pertain the ideas of the speech of spirits, which are of the inner sight, and all rational things, from the ideas of which thought itself comes into existence. That these two classes of things are distinct from each other, man does not know, both because he does not reflect upon it, and because he is in corporeal things, from which he cannot then so far withdraw his mind.