'The Noonday Demon' Andrew Solomon 2001

'It was also in depression that I learned my own acreage, the full extent of my soul.'
 
'I have discovered what I would have to call a soul, a part of myself I could never have imagined until one day, seven years ago, when hell came to pay me a surprise visit. It's a precious discovery.'

 http://andrewsolomon.com/books/the-noonday-demon/

http://www.nytimes.com/books/01/06/24/reviews/010624.24oatest.html

http://www.guardian.co.uk/books/2001/may/06/booksonhealth.medicalscience