CHAPTER IV
BUT how came the fool to say in his heart that which he could not conceive? or how came he to be able not to conceive that which 15yet he said in his heart? For it may be thought that to conceive and to say in one’s heart are one and the same thing. If it is true—nay, because it is true, that he conceived it, because he said it in his heart; and also true that he did not say it in his heart because he could not conceive it; it follows that there are two senses in which something may be understood to be conceived or said in the heart. For in one sense we are said to have a conception of something, when we have a conception of the word that signifies it; and in another sense, when we understand what the thing really is. In the former sense then we may say that God is conceived not to exist: but in the latter, He cannot by any means be conceived not to exist. For no man that understandeth what fire and water mean, can conceive that fire is really water; though he may have this conception, as far as the words go. Thus in like manner no man that understandeth what God is can conceive that God does not exist; although he may say these words [that God does not exist] either with no meaning at all, or with some other meaning than that which they properly bear. For God is that than which no greater can be conceived. He who well understandeth what this is, certainly understandeth it to be such as cannot even be conceived not to exist. Whosoever therefore understandeth in this way that God exists, cannot conceive that he does not exist. Thanks be to Thee, O good Lord, thanks be to Thee! because that 16which heretofore I believed by Thy grace, I now by Thine illumination thus understand, so that, even though I should not wish to believe in Thine existence, I cannot but understand that Thou dost exist.