Some people might think to consider yourself the centre of the universe a little bit arrogant, however i believe it's impossible to truly know what life is like for other people, the best you can do is an educated guess. Don't get me wrong I'm not advocating that you act with disregard toward other peoples feelings or without consideration to your impact upon your surroundings.
However to truly engage with the world and somehow regurgitate these experiences back to the outside world in a visual or written format the artist can only really theoretically take themselves as the starting/central point from which all measurements are made.