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 attitudes to this ultimate reality. There is the attitude of the metaphysician and theologian, who are convinced not only that it exists but that it can be at least partly known. There is the attitude of the man who denies that it exists; but he must be also a metaphysician, for its existence can only be disproved by metaphysical arguments. Then there are those who assert that it exists but deny that we can know anything about it. And finally there are those who say that we cannot know whether it exists or not. These last are "agnostics" in the strict sense of the term, men who profess not to know. The third class go beyond phenomena in so far as they assert that there is an ultimate though unknowable reality beneath phenomena. But agnostic is commonly used in a wide sense so as to include the third as well as the fourth class—those who assume an unknowable, as well as those who do not know whether there is an unknowable or not. Comte and Spencer, for instance, who believed in an unknowable, are counted as agnostics. The difference between an agnostic and an atheist is that the atheist positively denies the existence of a personal God, the agnostic does not believe in it.

The writer of this period who held