[To understand George Romanes' mind close attention must be paid to the following section. Also to the fact, not explicitly noticed by him, that he uses the word 'reason' (see p. 112) in a sense closely resembling that in which Mr. Kidd has recently used it in his _Social Evolution_. He uses it, that is, in a restricted sense as equivalent to _the process of scientific ratiocination_. His main position is therefore this: Scientific ratiocination cannot find adequate grounds for belief in God. But the pure agnostic must recognize that God may have revealed Himself by other means than that of scientific ratiocination. As religion is for the whole man, so all human faculties may be required to seek after God and find Him--emotions and experiences of an extra-'rational' kind. The 'pure agnostic' must be prepared to welcome evidence of all sorts.--ED.] It is desirable to be clear at the outset as to the meaning which I shall throughout attach to certain terms and phrases. _Theism._ It will frequently be said, 'on the theory of Theism,' 'supposing Theism true,' &c. By such phrase my meaning will always be equivalent to--'supposing, for the sake of argument, that the nearest approach which the human mind can make to a true notion of the _ens realissimum_, is that of an inconceivably magnified image of itself at its best.' _Christianity._ Similarly, when it is said, 'supposing Christianity true,' what will be meant is--'supposing for the sake of argument, that the Christian system as a whole, from its earliest dawn in Judaism, to the phase of its development at the present time, is the highest revelation of Himself which a personal Deity has vouchsafed to mankind.' This I intend to signify an attitude of pure agnosticism as regards any particular dogma of Christianity--even that of the Incarnation.