Certain it should be that, beyond and about this World of Length, and Breadth, and Thickness, there is another World, or State of Existence, consisting of these and another dimension of which only those beings who are privileged to enter or dwell in it can have any conception. Now, if this postulate be granted, it follows that a dweller in this State would be freed from those conditions of Time and Space which bind those beings who are confined within the limits of Tri-Dimensional Space, or Existence. For example, he would be able to make himself visible or invisible to us at will by entering into or withdrawing himself from this State, and returning into that of Four Dimensions, whither our eyes could not follow him—even though he might be close to us in our sense of nearness. Moreover, he could be in two or more places at once, and cause two bodies to occupy the same space—which to us is inconceivable. Stranger still, he might be both alive and dead at the same time—since Past, Present, and Future would be all one to him; the world without beginning or end ..."—From the "Geometrical Possibilities," of Abd'el Kasir, of Cordoba, circa. 1050 A.D.