10 When I say “No cat has two tails” I do not mean, as the old fallacy runs, that “ Absence-of-cat possesses two tails” but that “In the category of two-tailed things, there is no extension of cat.” Nothingness is that about which no positive pro- position is valid. We cannot truly affirm : ‘Nothingness is green, or heavy, or sweet.” Let us call time, space, being, heaviness, hunger, the categories. “ If a man be heavy and hungry, he is extended in all these, besides, of course, many more. But let us suppose that these five are all. Call the man X; his formula is then Xt+#+4+», If he now eat, he will cease to be extended in hunger; if he be cut off from time and gravitation as well, he will now be repre- sented by the formula X++*, Should he cease to occupy space and to exist, his formula would then be X*. This expression is equal to 1; whatever X may represent, if it be raised to the power of 0, (this meaning mathemat- ically “if it be extended in no dimension or category”) the result is Unity, and the unknown factor X is eliminated. A This is the Advaitist idea of the future of man; his personality, bereft of all its qualities, disappears and is lost, while in its place arises the impersonal Unity, The Pleroma, Parabrahma, or the Allah of the Unity-adoring followers of Mehammed. (To the Musulman fakir, Allah is by no means a personal God.) +I cannot here diseuss the propriety of representing the categories a& dimensfons, It-will be obvious to anystudent of the integeal calculi, OF {© anyone who appreciates the geometrical sigaincance of the rm X*