mind, is, indeed, a necessary consequence of that law by which it perceives diversity and number; but a generic and essential difference is wholly arbitrary. The principle of the agreement and similarity of all thoughts, is, that they are all thoughts; the principle of their disagreement consists in the variety and irregularity of the occasions on which they arise in the mind. That in which they agree, to that in which they differ, is as everything to nothing. Important distinctions, of various degrees of force, indeed, are to be established between them, if they were, as they may be, subjects of ethical and economical discussion; but that is a question altogether distinct. By considering all knowledge as bounded by perception, whose operations may be indefinitely combined, we arrive at a conception of Nature inexpressibly more magnificent, simple and true, than accords with the ordinary systems of complicated and partial consideration. Nor does a contemplation of the universe, in this comprehensive and synthetical view, exclude the subtlest analysis of its modifications and parts.     

       A scale might be formed, graduated according to the degrees of a combined ratio of intensity, duration, connexion, periods of recurrence, and       utility, which would be the standard, according to which all ideas might be measured, and an uninterrupted chain of nicely shadowed distinctions would be observed, from the faintest impression on the senses, to the most distinct combination of those impressions; from the simplest of those combinations, to that mass of knowledge which, including our own nature, constitutes what we call the universe.     

       We are intuitively conscious of our own existence, and of that connexion in the train of our successive ideas, which we term our identity. We are conscious also of the existence of other minds; but not intuitively. Our evidence, with respect to the existence of other minds, is founded upon a very complicated relation of ideas, which it is foreign to the purpose of this treatise to anatomize. The basis of this relation is, undoubtedly, a periodical recurrence of masses of ideas, which our voluntary determinations have, in one peculiar direction, no power to circumscribe or to arrest, and against the recurrence of which they can only imperfectly provide. The irresistible laws of thought constrain us to believe that the precise limits of our actual ideas are not the actual limits of possible ideas; the law, according to which these 

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