[14] The opponents of the theory of the Mass are apt to charge the Roman Church with the proposition that therein the elements are changed into “real” flesh and blood. In the nineteenth century, as in the thirteenth, this Church has not, I believe, determined whether the “real” substance be corporeal or incorporeal, separable or inseparable from the sensible properties of things; whether in a word it be something or, as many of us would say, nothing at all. Spinoza regarded “substance” as intelligent and extended. [15] Thus it was difficult to claim his authority for one side or the other. The metaphysical treatises were not known till the later part of the twelfth century. (See p. 75, note 2.) At the outset of the Physics Aristotle discusses what nature is in itself, and defines first elements; in the Second Analytics on the other hand, although thinking of science as deductive and expository, he strongly opposes the primary existence of ideas, though these are predicable of many individuals. By excess of logical formations, the division of properties, the use of such terms as “γένη ὑποκείμενα,” &c. &c., he laid himself open to misconception, and so was readily platonised by his commentators. It would seem indeed that for Aristotle universals were not merely propositions obtained by negation of individual variations, but something more active. A νόησις became somehow a ποίησις; e.g. “ἡ δημιουργήσασα φύσις.” His position may be appreciated briefly thus:—In the Categories Aristotle speaks of individuals as primarily existent, while in Met. Z, and elsewhere, the primary existent is the form. The inconsistency is, however, more apparent than real; for in the Categories it is the individual so far as he represents his natural kind which is primarily existent, whilst the form which in the Metaphysics is primarily existent occurs only in the individual. This terse appreciation is one of my many debts to Dr Jackson. [16] It were almost to be desired, for our own lucidity, that we could get rid of the words cause and law, and use language significant of order only. Aristotle’s influence has weighed heavily in favour of studying “Causes” rather than sequences; thus it is hard to clear our own minds, and impossible to clear the minds of our pupils, of a genetic notion of causation—that an effect comes, as it were, from the womb of its causes. Even Ockham taught as if causes contained their effects. Mr Marshall (West. Rev. loc. cit.) is of opinion that Roger Bacon by his “non oportet causas investigare” intended to confine scientific thought to the relations of phenomena. [17] As St Anselm put it, “Participatione speciei plures homines sunt unus homo.” Out of humanity individual men proceed. [18] Vid. p. 32, note.