M. Le Roy also seems to know only these two categories. Whatever is not 'practical'--having an immediate and obvious bearing on conduct--is stigmatised as 'theoretical' or 'speculative.' But the whole field of scientific study lies outside this classification, which pretends to be exhaustive. Science has no 'practical' aim, in the narrow sense of that which may serve as a guide to moral action; nor does it deal with 'theoretical' or 'speculative' ideas, except provisionally, until they can be verified. The aim of science is to determine the laws which prevail in the physical universe; and its motive is that purely disinterested curiosity which is such an embarrassing phenomenon to pragmatists. And since the faith which lies behind natural science is at least as strong as any other faith now active in the world, it is useless to frame categories in such a way as to exclude the question, 'Did this or that occurrence, which is presented as an event in the physical order, actually happen, or not?' The question has a very definite meaning for the man of science, as it has for the man in the street. To call it 'theoretical' is ridiculous. What M. Le Roy means by 'interpreting dogmas in the language of practical action' may be gathered from his own illustrations. The dogma, 'God is our Father,' does not define a 'theoretical relation' between Him and us. It signifies that we are to behave to Him as sons behave to their father. 'God is personal' means that we are to behave to Him as if He were a human person. 'Jesus is risen' means that we are to think of Him as if He were our contemporary. The dogma of the Real Presence means that we ought to have, in the presence of the consecrated Host, the same feelings which we should have had in the presence of the visible Christ. 'Let the dogmas be interpreted in this way, and no one will dispute them.'[78] The same treatment of dogma is advocated in Mr. Tyrrell's very able book 'Lex Orandi.' The test of truth for a dogma is not its correspondence with phenomenal fact, but its 'prayer-value.' This writer, at any rate before his suspension by the Society of Jesus, to which he belonged, is less subversive in his treatment of history than the French critics whom we have quoted. Although in apologetics the criterion for the acceptance of dogmas must, he thinks, be a moral and practical one, he sometimes speaks as if the 'prayer-value' of an ostensibly historical proposition carried with it the necessity of its truth as matter of fact. 'Between the inward and the outward, the world of reality and the world of appearances, the relation is not merely one of symbolic correspondence. The distinction that is demanded by the dualism of our mind implies and presupposes a causal and dynamic unity of the two. We should look upon the outward world as being an effectual symbol of the inward, in consequence of its natural and causal connection therewith.'[79]