In reality there is one life and there is one existence. What we call this world or that world is for our convenience. It is our speculation, it is our way of distinguishing between the different dimensions. What is a dimension in reality? A dimension is rather a conception. There is only existence. It is just the same with time. There is no such thing as time; it is we who have a certain conception of it. But there is only existence, there is an eternal continuity of life. In the same way "this world and that world" is only our conception of all that hides the other world from our material physical eyes with which we have always been accustomed to look at life.