29 R. Does this proposition seem to you to be true: Whatever is, is compelled to be somewhere? A. Nothing so entirely wins my consent. R. And you confess that Truth is? A. I confess it. R. Then we must needs inquire where it is; for it is not in a place, unless perchance you think there is something else in a place than a body, or think that Truth is a body. A. I think neither of these things. R. Where then do you believe her to be?
For she is not nowhere, whom we have granted to be. A. If I knew where she was, perchance I should seek nothing more. R. At least you are able to know where she is not? A. If you pass in review the places, perchance I shall be. R. It is not, assuredly, in mortal things. For whatever is, cannot abide in anything, if that does not abide in which it is: and that Truth abides, even though true things perish, has just been conceded. Truth, therefore, is not in mortal things.
But Truth is, and is not nowhere. There are therefore things immortal. And nothing is true in which Truth is not. It results therefore that nothing is true, except those things which are immortal. And every false tree is not a tree, and false wood is not wood, and false silver is not silver, and everything whatever which is false, is not. Now everything which is not true, is false. Nothing therefore is rightly said to be, except things immortal. Do you diligently consider this little argument, lest there should be in it any point which you think impossible to concede. For if it is sound, we have almost accomplished our whole business, which in the other book will perchance appear more plainly.
Source: Soliloquies (New Advent)