For you cannot make them understand the essential point, which is that when you went away you took the centre of the universe with you, so that the whole thing went on revolving, just as usual, round your own head. How could they, indeed, be expected to believe this, when they know quite well that all the time the centre of everything stayed at home with them? It is a day or two, as a rule, before your universe and theirs (like the two images in a photographic range-finder) merge and become concentric: and when what happens, you know you are really home.
