28 The Destiny of Man. 



since the appearance of the first faint pig- 

 ment-spot which by and by was to translate 

 touch into vision, as it developed into the 

 lenses and humours of the eye. 2 Special 

 organs of sense and the lower grades of 

 perception and judgment were slowly de- 

 veloped through countless ages, in com- 

 pany with purely physical variations of 

 shape of foot, or length of neck, or com- 

 plexity of stomach, or thickness of hide. 

 At length there came a wonderful moment 

 silent and unnoticed, as are the begin- 

 nings of all great revolutions. Silent and 

 unnoticed, even as the day of the Lord 

 which cometh like a thief in the night, 

 there arrived that wonderful moment at 

 which psychical changes began to be of 

 more use than physical changes to the 

 brute ancestor of Man. Through further 

 ages of ceaseless struggle the profitable 

 variations in this creature occurred oftener 

 and oftener in the brain, and less often in 

 other parts of the organism, until by and 

 by the size of his brain had been doubled 



