Full Idea
As a child it was incomprehensible to me that I did not experience going to sleep, and never remembered it. When my sister said 'Nobody remembers that', I just thought 'How does she know?'
Gist of Idea
Why don't we experience or remember going to sleep at night?
Source
Bryan Magee (Confessions of a Philosopher [1997], Ch.I)
Book Reference
Magee,Bryan: 'Confessions of a Philosopher (1st ed)' [Phoenix 1998], p.1
A Reaction
This is actually evidence for something - that we do not have some sort of personal identity which is separate from consciousness, so that "I am conscious" would literally mean that an item has a property, which it can lose.