'Yes, that's it,' said the Hatter with a sigh. 'It's always tea-time and we've no time to wash the things between whiles.'
This sounded pleasant enough, but, of course, odd too, which was due to the fact that Alice lived before 1908. Since that time, and especially since 1913, a number of gentlemen wearing glasses and looking wondrous wise, and no doubt as wise as they look, have proved to us that it can always be teatime if we care to figure it out properly and get away from a commonplace three-dimensional existence.
To-day any budding physicist can tell you without cracking a smile that 'a conception of the physical world in its objective four-dimensional scheme would merely be an abridged statement of the correspondence of the subjective time-space experiences in the realm of the various senses, and nothing more.' Remember, it is not the Hatter speaking now, but the average serious-minded young man or woman at college, who has been taking notes of the lectures on Relativity given by the Professor of Mathematical Physics. The words used above happen to be those of an Oxford Don, but the professors at almost any other University can put the case just as succinctly. Perhaps at the University on the Cam they discuss gravitation, space, and time more than elsewhere, which is natural when we recall that Sir Isaac Newton himself and Lewis Carroll were once undergrads there and, later, professors. The Cambridge Professor of Astronomy is easily a leader in demonstrating the new Einsteinian theory of gravitation. Sir Isaac never had a theory of gravitation, only a law; but Einstein has both theory and law.