What do we actually experience in sleep?
A friend wrote to me recently asking me to further clarify what I had written in Chapter 2 of Happiness and the Art of Being about sleep being a state in which we are still conscious or aware that we exist, and after I replied to him he wrote again saying that though he would like to be convinced that he is aware in sleep, he is still not entirely sure that this is the case. The following is adapted from the replies that I wrote to his two emails. First reply: When you say, ‘I fall asleep and I’m not aware of anything’, what exactly do you mean by saying ‘I’m not aware of anything’? Do you mean that you are not aware at all, or that you are aware of nothing? Please do not rush to answer this question to yourself, but think about it carefully. Consider the difference between the experience of a totally blind person (B) and a normally sighted person (S) when they are both in a completely dark room. B does not see anything because he does not see at all, so he does not know that the roo...