330 PHYSICAL EXPRESSION. 



mately connected with one another. This con- 

 nection is so close, that one species often runs into 

 another so imperceptibly, that it is difficult to say 

 where the one begins and the other ends. This is 

 particularly the case with the lowest of one species, 

 and the highest of that immediately below it. On 

 this account no one link of the great chain can be 

 perfectly understood, without the knowledge, at 

 least, of the links that are nearest to it." 



"The active principle is so vigorous and over- 

 flowing in a Child, that it loves to be in perpetual 

 motion itself, and to have every object around it in 

 motion. This exuberant activity is given it for the 

 wisest purposes, as it has more to do and more to 

 learn in the first three years of its life than it has 

 in thirty years of any future period of it. But 

 that lively and restless spirit, which in infancy 

 seemed to animate everything around it, gradually 

 contracts itself, as the Child advances in Life, nature 

 requiring no more motion than is necessary for its 

 preservation, and sinks at last into that calm and 

 stillness which close the latter days of human 

 life" (p. 61). 



Gregory speaks of the human mind as an object 

 extremely fleeting and ever varying. He believed it 

 to be governed by laws as fixed and invariable as 

 those of the material system. Gregory thought 

 that an inquiry as to mind, should embrace con- 

 siderations concerning other living beings in nature 

 besides man. It would appear that one of the great 

 difficulties that he saw in the way of the study of 

 mind was the fleeting character of its signs, or 



