EVOLUTION THE MASTER-KEY 



But though modern physical inquiry has ousted 

 the dogmatists from their fortress of matter, they 

 have, as it would appear, an impregnable citadel in 

 mind. They may freely admit the lessons taught 

 by the phenomena of radio-activity, and may 

 freely assent to the doctrine, truly time-honored, 

 that our knowledge of the "external world" of 

 not-mind is merely an inference, however irresist- 

 ible, from certain changes in our consciousness. 

 All this the dogmatist may grant, but yet find a 

 stable footing in the doctrine that, though matter 

 is but an inference from mental states, yet mind, 

 on the other hand, is directly known to us the 

 only thing, indeed, that is so known. It would 

 thus follow that whereas the phenomena of not- 

 mind are demonstrably occult, mind and its phe- 

 nomena are demonstrably patent ; for, whereas our 

 knowledge of not-mind is mediate, inferential, 

 at the mercy of sensation, with its few avenues, 

 each of which is known to be imperfect and mis- 

 leading, our knowledge of mind is immediate, 

 direct, involved in the possibility of any knowing 

 at all, independent of all external factors, and care- 

 less of all sources of fallacy, since mind's knowledge 

 of itself is supra or extra or pre logical. 



But if we really know mind as it has been argued 

 that we must, there could be no psychology or 

 " metapsychics. " For these sciences treat mind 

 objectively just as physics treats matter, and yet 

 they would appear to have their problems still to 

 solve which is not conceivable on the theory that 

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