The Notebooks of Leonardo Da Vinci Complete


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On the origin of the soul.  
8
37.  
Though human ingenuity may make various inventions which, by the  
help of various machines answering the same end, it will never  
devise any inventions more beautiful, nor more simple, nor more to  
the purpose than Nature does; because in her inventions nothing is  
wanting, and nothing is superfluous, and she needs no counterpoise  
when she makes limbs proper for motion in the bodies of animals. But  
she puts into them the soul of the body, which forms them that is  
the soul of the mother which first constructs in the womb the form  
of the man and in due time awakens the soul that is to inhabit it.  
And this at first lies dormant and under the tutelage of the soul of  
the mother, who nourishes and vivifies it by the umbilical vein,  
with all its spiritual parts, and this happens because this  
umbilicus is joined to the placenta and the cotyledons, by which the  
child is attached to the mother. And these are the reason why a  
wish, a strong craving or a fright or any other mental suffering in  
the mother, has more influence on the child than on the mother; for  
there are many cases when the child loses its life from them, &c.  
This discourse is not in its place here, but will be wanted for the  
one on the composition of animated bodies--and the rest of the  
definition of the soul I leave to the imaginations of friars, those  
fathers of the people who know all secrets by inspiration.  
688  


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