But enough of illustrations: although these, multipliable to any amount, might bring, each in its own case, some specific tendency to throw light upon the path we mean to tread: it is wiser perhaps, as implying more confidence in the reader's intellectual powers, to leave other analogous cases to the suggestion of his own mind; also, not to vex him in every instance with the intrusive finger of an obvious application. Meanwhile, it is a just opportunity to clear the way at once of some obstructions, by disposing of a few matters personal to the writer; and by touching upon sundry other preliminary considerations. 1. The line of thought proposed is intended to show it probable that any thing which has been or is, might, viewed antecedently to its existence, by an exercise of pure reason, have by possibility been guessed: and on the hypothesis of sufficient keenness and experience, that this idea may be carried even to the future. Any thing, meaning every thing, is a word not used unadvisedly; for this is merely a suggestive treatise, starting a rule capable of infinite application: and, notwithstanding that we have here and now confined its elucidation to some matters of religious moment only, as occupying a priority of importance, and at all times deserving the lead; still, if knowledge availed, and time and space permitted, I scarcely doubt that a vigorous and illuminated intellect might so far enlarge on the idea, as to show the antecedent probability of every event which has happened in the kingdoms of nature, providence, and grace: nay, of directing his guess at coming matters with no uncertain aim into the realms of the immediate future. The perception of cause in operation enables him to calculate the consequence, even perhaps better than the prophecy of cause could in the prior case enable him to suspect the consequence. But, in this brief life, and under its disturbing circumstances, there is little likelihood of accomplishing in practice all that the swift mind sees it easy to dream in theory: and if other and wiser pens are at all helped in the good aim to justify the ways of God with man, and to clear the course of truth, by some of the notions broadcast in this treatise, its errand will be well fulfilled.