Oliver Sacks parla del funzionamento della memoria e dello scrivere memoriali. "In 1993, approaching my sixtieth birthday, I started to experience a curious phenomenon—the spontaneous, unsolicited rising of early memories into my mind, memories that had lain dormant for upward of fifty years. Not merely memories, but frames of mind, thoughts, atmospheres, and passions associated with them—memories, especially, of my boyhood in London before World War II. Moved by these, I wrote two short memoirs ... I think a more general autobiographical impulse was stimulated, rather than sated, by these brief writings, and late in 1997, I launched on a three-year project of writing a memoir of my boyhood, which I published in 2001 as Uncle Tungsten. ... I accepted that I must have forgotten or lost a great deal, but assumed that the memories I did have—especially those that were very vivid, concrete, and circumstantial—were essentially valid and reliable; and it was a shock to me when I found that some of them were not". nybooks.