Variant: The area dividing the brain and the soul 
Is affected in many ways by experience --
Some lose all mind and become soul:
insane.
Some lose all soul and become mind:
intellectual.
Some lose both and become:
accepted. 
Source: You Get So Alone at Times That it Just Makes Sense
                                    
        “Some lose all mind and become soul, insane.
some lose all soul and become mind, intellectual.
some lose both and become accepted”
    
    
    
    
        
        
        
            
            
        
        
        
        
        
        Variant: Some lose all mind and become soul, insane. Some lose all soul and become mind, intellectual. Some lose both and become accepted.
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Charles Bukowski 555
American writer 1920–1994Related quotes
“And into the forest I go, to lose my mind and find my soul.”
                                        
                                        Once again, this is far from Muir's style of writing.  The quote does not come up in any search of John Muir's Journals or his published texts on the John Muir Exhibit website.  It is most commonly put on t-shirts -  never in any scholarly source. 
Misattributed
                                    
“If you're losing your soul and you know it, then you've still got a soul left to lose.”
“You gotta be rich to be insane, Hol. Losing your mind is not a luxury for the middle class.”
Source: P.S. I Love You
                                        
                                        Anatol Rapoport, Strategy and Conscience. Harper & Row, 1964. p. 195 
1960s
                                    
The Notebooks of Leonardo da Vinci (1883), I Prolegomena and General Introduction to the Book on Painting
Source: The Parables of Jesus: Sermons by Saint Gregory Palamas