172. Perhaps someone says “There must be some basic principle on which we accord credence”, but what can such a principle accomplish? Is it more than a natural law of ‘taking for true’?361. But I might also say: It has been revealed to me by God that it is so. God has taught me that this is my foot. And therefore if anything happened that seemed to conflict with this knowledge I should have to regard that as deception.505. It is always by nature^ grace that one knows something.670. We might speak of fundamental principles of human enquiry.