On the Move: A Life by Oliver Sacks:
My mother’s death was the most devastating of my life—the loss of the deepest and perhaps, in some sense, the realest relation of my life. I found it impossible to read anything mundane; I could only read the Bible or Donne’s Devotions when I finally went to bed each night.
When the formal mourning was over, I stayed in London and returned to writing, with a sense of my mother’s life and death and Donne’s Devotions dominating all my thoughts. And in this mood, I wrote the later, more allegorical sections of Awakenings, with a feeling, a voice, I had never known before.