In particular, it must revise its notions of space, time, and substance. This revision is quite independent of the Einstein theory, and is made necessary, not by that theory but by the quantum theory. A first attempt at this revision has been made by that great mathematical philosopher, Professor Whitehead.[5] We need not deal with his investigation, which is at present in a highly technical state. The space and time of the new theory are interconnected and do not consist of independent volumes and instants. Every volume of space has reference to the whole of space, and every moment of time refers both to the past and the future. Hence both memory and expectation are given a rational basis. On the old view, as Hume pointed out, there is no reason whatever to suppose that the order of nature should continue. Why do we expect that the force of gravity will be in existence to-morrow? There was no _reason_ at all for this expectation or for any other. That is to say, the whole of science itself was based on blind faith. The new foundations of science make science itself a rational activity. As for the notion of “substance”, Professor Whitehead proposes to replace it by the notion of “organism”. We may imagine an electron, for instance, as a repeated pattern of events. One of the great difficulties of the quantum phenomena is that an electron seems to pass from one place to another without passing through the intervening space. On the basis of the new abstractions this difficulty can be overcome. We have to imagine an electron as requiring a certain time to manifest itself――just as a tune does. [5] _Science and the Modern World._ From our present point of view, however, the chief interest attaching to these new foundations for science is the place occupied in them by the intuitions of the poets. Mr Richards, literary critic, tells us that the poets must learn from science; Professor Whitehead, mathematician and physicist, tells us that science must learn from the poets. Instead of the poet having to realize that his intuitions are illusory and belong to a childish, _démodé_ view of the world, it is the scientific man who must realize that his abstractions are too thin and narrow to be any longer useful, and that the poet makes closer contact with reality. When Wordsworth says: “Ye Presences of Nature in the sky And on the earth! Ye Visions of the hills! And Souls of lonely places! can I think A vulgar hope was yours when ye employed Such ministry, when ye through many a year Haunting me thus among my boyish sports, On caves and trees, upon the woods and hills, Impressed upon all forms the characters Of danger or desire; and thus did make The surface of the universal earth With triumph and delight, with hope and fear Work like a sea?...”