DECOMPOSITION OF LIGHT COLOURS. 75 



absolute want of translucency ; the mediate members are 

 offuscated light, mediate tensions of aether. 



358. The mean tension of aether, or light mingled with 

 darkness, is called Colour. Colour is a finite, fixed light, 

 the actual transmission of light into matter. 



359. No matter can be uncoloured. An uncoloured 

 matter is a nonentity. 



360. Since matter is rigidified light, even so must it 

 be posited in reference to colour, like light. Pure light 

 materially substantiated or posited is White. The 

 untensed aether materially posited is Slack. 



361. The mediate tensions of aether, or the mixture of 

 Light and Dark, are mean conditions of White and Black, 

 mixtures of the two extremes or androgynisms of White 

 and Black. If we do not call White and Black colours, 

 colours are then partial positions of light in matter, or in 

 the dark. 



362. Colour originates only in the confinity of Light 

 and Dark, or in the limit between White and Black. They 

 are therefore microscopic. 



363. Darkness is the cause of colours. 



364. There is nothing visible but colour, but the 

 coloured matter. The Non-corporeal itself is invisible. 

 Darkness is the cause of all visibility. Were there no 

 darkness, there would be no world for the eye. Colours 

 are only illuminated darkness. 



365. In the limit between Light and Dark there is 

 neither White nor Black, but their possible mediate con- 

 ditions, or the proper colours, the material tensions of 

 aether. If the shadow-line of light be viewed under a 

 magnifying glass, colours will be seen to reside in it. 

 They are invisible only before on account of their minute- 

 ness. The prism and the lens do nothing else than 

 magnify the shadow-line of light. They only show 

 the colours that already exist therein, but do not create 

 them. 



366. There is properly only one colour between White 

 and Black ; it is the transmission of light into matter 

 generally. If we look through a prism with the re- 



