|(Somewhere in England)|
It is possible, for example while commuting to work, to entertain the fantasy that one has just this moment been put into this body going about its business, that one has come from somewhere else (perhaps a previous life which one has forgotten).
Luckily this body knows where it is going, and one knows that if one thought about it one would easily remember details such as what one's job is, one's home situation, loved ones and so on. But for the moment one doesn't pursue those thoughts. Therefore there is no need for any anxiety, yet at the same time one experiences the world as a stranger in a strange land.
The current Wikipedia article describes derealisation as "an alteration in the experience of the external world so that it seems unreal." However what I am describing makes the world seem more real. One realises that most of the time one is preoccupied with some thought or other, barely noticing one's surroundings. As a stranger freshly arrived from somewhere else one notices everything.
A similar phenomenon occurs when driving or walking to a new place. Even if the journey is quite short, it seems long, because one has to notice things in order to find one's way. The same journey when familiar seems short, and one remembers few details. It is possible to drive for an hour on a familiar route in perfect safety and remember nothing.
The Wikipedia article goes on to say that derealisation includes "feeling as though one's environment is lacking in spontaneity, emotional colouring, and depth." However with this experiment the world has more depth and colour, and things are generally brighter. If there is beauty, one notices it, sometimes in unexpected places.
Interestingly the Wikipedia article says that derealisation is related to depersonalisation, which is sense of unreality in one's personal self. There may well be an actual psychiatric or morbid condition characterised by this, but it is also of note that psychologists and philosophers have pointed out that the idea of 'self' itself has an unclear meaning, or even, the 'self' does not exist. Am I the same person I was yesterday? The one who decided to get up as soon as the alarm went off is the same as the one who decided to lie in for an extra 15 minutes instead? But this is a topic for another time.
I went in search of the original quotation, 'stranger in a strange land.' It comes from the King James Bible translation of Exodus 2:22 and is spoken by Moses in exile. I was also led to this excellent poem by Rita Dove. At the beginning of the poem Rita Dove quotes Emily Dickinson: "Life is a spell so exquisite, everything conspires to break it." It is by experiments like the one I describe, and others, that we can try to return to the magic of reality.