CoGiTic Evolution of Man 605 



atrophied, and buried beneath the load of biotic energy sub- 

 stance. Such are soon marked out for extinction by disease, 

 by oversurfeiting, by want of active response-capacity in the 

 struggle for existence. The higher and keener cognitic and 

 cogitic life of other competitors overwhelms them. 



But, as the history of man has emphatically shown, races or 

 individuals who have observed to *'keep under the body," and 

 who have cultivated active cognitic or sense perception occu- 

 pations, have yet failed to reach out to the more active mental 

 improvements that have been introduced into their midst, or 

 that have been discovered and adopted in other regions. So 

 though quickly responding to cognitic stimuli they have lagged 

 back mentally, and in time fall out of the race. 



It never was more true than at the present day that the 

 healthy ''successful" human organism is that which combines 

 in balanced proportion the biotic, the cognitic, and the cogitic 

 energizing currents, and the capacity of responding to like 

 stimuli. 



Sleep is another act, common to man and many — perhaps 

 most — animals, that shows certain well-marked stages. Through 

 lowering of the blood-pressure in and round the brain, possibly 

 also as a concomitant cause through accumulation of oxidizable 

 substances in the brain, the mental organization or cogitic sub- 

 stance becomes largely passive; next the sensory -motor or cog- 

 nitic follows ; while the vegetative or biotic alone remains active 

 during the sleep period. But the at times continuous and more 

 or less active or irregular movements of limbs, specially of the 

 hind limbs, indicates that there is a sub-conscious flow of cog- 

 nitic energy releasing itself, while dreams and semi-conscious 

 mental states suggest that the cogitic flow is for the time semi- 

 minimal to minimal. 



In line with this Maudsley says (198: 10): "Certainly it is 

 true that volition, in its highest sense of control over the mental 

 operations, is abolished in dreaming, as a moment's reflection 

 will show must needs be the case. For such volition is neither 

 more nor less than the exi)ression of the fullest coordinate 

 activity of the mental functions." And again he says: "For 



