In order to grasp it better we will transpose it into terms of two-and three space at the same time altering it slightly. Suppose that a two space world consists of a colossal soap film. Imagine a thin thread passing through the film and stretched between two points, one above the film and one below. If these two points move perpendicularly to the film the thread will move accordingly. The point where the thread cuts the film will remain stationary if the thread was perpendicular to the latter to start with, but will move if the thread was originally slanting. To a two space being inhabiting the film, all that will be visible of the thread will be a minute circle, an atom of two-space matter let us say. Now let us imagine an enormous number of such threads, sufficient to produce all the atoms necessary to make up a complete two space universe. Suppose also that these are twisted and intertwined in the most complicated possible manner. Then as they pass across the soap film they will give rise to the most complex changes in the two space world. A three space being, however, could see the filamentary structure as a whole and would not be limited to the particular section which happened to be crossing the film at any given moment. I must again insist that I do not for a moment regard this as being anything like a true picture of what actually occurs. The point I wish to make is merely that if, as seems to be the case, three space change can be represented spatially by the use of four space ideas, then it is not utterly inconceivable that a consciousness free to move in four space and independent of three space limitations, should be able in some obscure way to foresee coming changes. * * * * * There is a prevalent notion to the effect that if we admit the possibility of prevision we are bound to become involved in the slough of Fatalism. "If we can foresee what is going to happen," it is urged, "then the future must be already settled, and we have no power of altering it." This view appears to me to be fallacious. Consider again for a moment the filamentary world. Our forecast of events therein is based on the assumption that the filamentary structures remain unaltered, that the cross-sections which will be traversed by the film will not be changed before it gets there. This is pure assumption and quite unwarranted. In the first place the two space beings themselves might be able to alter the arrangement of the threads during their passage across the film, implying of course the exercise of three space forces, and the possession of a certain degree of three-dimensionality, on their part. In the second place all sorts of extraneous three space forces might be applied.