The Notebooks of Leonardo Da Vinci Complete


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part of man which constitutes his judgment is caused by a central  
organ to which the other five senses refer everything by means of  
impressibility; and to this centre they have given the name Common  
Sense. And they say that this Sense is situated in the centre of the  
head between Sensation and Memory. And this name of Common Sense is  
given to it solely because it is the common judge of all the other  
five senses i.e. Seeing, Hearing, Touch, Taste and Smell. This  
Common Sense is acted upon by means of Sensation which is placed as  
a medium between it and the senses. Sensation is acted upon by means  
of the images of things presented to it by the external instruments,  
that is to say the senses which are the medium between external  
things and Sensation. In the same way the senses are acted upon by  
objects. Surrounding things transmit their images to the senses and  
the senses transfer them to the Sensation. Sensation sends them to  
the Common Sense, and by it they are stamped upon the memory and are  
there more or less retained according to the importance or force of  
the impression. That sense is most rapid in its function which is  
nearest to the sensitive medium and the eye, being the highest is  
the chief of the others. Of this then only we will speak, and the  
others we will leave in order not to make our matter too long.  
Experience tells us that the eye apprehends ten different natures of  
things, that is: Light and Darkness, one being the cause of the  
perception of the nine others, and the other its absence:-- Colour  
and substance, form and place, distance and nearness, motion and  
stillness [Footnote 15: Compare No. 23.].  
687  


Page
685 686 687 688 689

Quick Jump
1 306 613 919 1225