CLASSIFICATION OF KNOWLEDGE 13 



The parts of the triangle lying nearer the centre 

 correspond with complex sciences, which need the 

 conceptions of all three primaries. Astronomy lies 

 in the purple region, where the chief elements are 

 mathematics and physics ; geology, in the yellow, 

 depends chiefly on physics and biology. Historical 

 and political science, a greenish-blue, is built up 

 chiefly on psychology and biology, but it is affected 

 by the physical structure of man, by the physical 

 conformation of the earth and heavens, and by 

 those mechanical laws in conformity with which 

 mankind always has had to live. Thus physical 

 science is also involved. 



As we approach the white central point we come to 

 those great subjects which need a proportionate 

 knowledge of all sciences for their treatment, the 

 subjects of metaphysics, the study of the nature of 

 reality ; philosophy, the science of the co-ordination 

 of knowledge ; and theology, in its widest sense the 

 study of the meaning and purpose of the universe, 

 both external and internal. 



But how are we to picture to ourselves the use of 

 this coloured triangle, this scheme of science, in the 

 examination of the knowable both within and 

 without ourselves ? 



Let us suppose that we are placed in a room, the 

 only window of which is a triangle of glass coloured 

 in accordance with our diagram. 



