Propositions.--Existence is prior to its modes. This follows from definitions 1 and 3, because modes of existence are conceived relatively and in dependence on existence, which is absolutely precedent in such conception. Existences having different attributes have nothing in common with each other. This is founded on definition 1. Existences have nothing in common with each other, can not be the cause of, or affect one another. If they have nothing in common, they can not be conceived by means of each other (per axiom 5), and they can not be conceived as relating to each other, but must be conceived _per se_ (per definition 1); and as (per axiom 4) the knowledge of an effect depends on the knowledge of the cause and includes it, it is impossible to conceive any existence as an effect, so long as you can not conceive it in relation to any other existence. By "cause" in the absolute, I mean "existence." In its popular or relative sense, I use "cause" as an effect of some precedent causative influence, itself the cause of some consequent effect, as the means toward an end, in the accomplishment of which end it completes itself. What fact is there so certain that I may base all my reasonings upon it? My existence is this primary fact; this, to me, indubitable certainty. I am. This logic can neither prove nor disprove. The very nature of proof is to make a proposition more clear to the mind than it was before, and no amount of evidence can in-crease my conviction of the certainty of my own existence. I do not affirm that I am in existence, but I affirm that there is existence. This existence is either eternal, that is, unlimited in duration, that is, indefinite in duration; or else it had a beginning, that is, it has been created. If created, then such creation must be by some existence the same as itself, or by some existence differing from itself. But it can not have been created by any existence the same as itself, because to imagine such, would be to conceive no more than a continuance of the same existence--there would be no discontinuity. "But," says S. T. Coleridge, "where there is no discontinuity, there can be no origination." And it can not have been created by any existence differing from itself, because things which have nothing in common with one another can not be the cause of, or affect, one another. Therefore, this existence has not been created, that is, its duration is indefinite--that is, you can not conceive a beginning--that is, it is eternal. This eternal existence is either infinite in extent, that is, is unlimited in extent, or it is finite, that is, limited. If limited, it must be limited by an existence the same as itself, or by an existence differing from itself. But the same arguments which applied to a limitation of duration, also apply to a limitation of extension. Therefore, this existence is unlimited in extent; that is, is infinite and eternal--that is, there is only one existence.