pronounce generally whether there were few or many of these panes of glass, but we should know the precise number, or at least pitch on some precise number in our minds, and this we could not help knowing. There must be either 5, 10, 20, or 30; for it is in vain to urge that the idea in my mind is a floating one, and shifts from one of them to another, so that I cannot tell the moment after which it was; but what is this imperfect recollection but a confused contradictory and abstract idea? Here is a plain dilemma: it is a fact that we have some idea of a number of objects presented to us. It is also a fact that we do not know the precise number, nor can we assign any number confidently whether right or wrong. Whether this idea is but an abstract and general one it seems hard to say. Those who contend that we cannot have an idea of a man in general, without conceiving of some particular man, seem to have little reason, since the most particular idea we can form of a man, either in imagination or from the actual impression, is but a general idea. Those who say we cannot conceive of an army of men without conceiving of the individuals composing it, ought to go a step further, and affirm that we must represent to ourselves the features, form, complexion, size, posture, and dress, with every other circumstance belonging to each individual. We must admit the notion of abstraction, first or last, unless any one will contend for this infinite refinement in our ideas of things, or assert that we have no idea at all. For the same process takes place in it, and is absolutely necessary to our most particular notions of things, as well as our most general, namely, that of abstracting from particulars, or of passing over the minute differences of things, taking them in the gross, and attending to the general effect of a number of distinguished and distinguishable impressions. It is thus we arrive at our first notion of things, and thus that all our after knowledge is acquired. The knowledge upon which our ideas rest is general, and the only difference between abstract and particular, is that of being more or less general, of leaving out more or fewer circumstances, and more or fewer objects, perceived either at once or in succession, and forming either a particular whole, aggregate, or a class of things. It may be asked farther whether our ideas of things, however abstract in general, with respect to the objects they represent, are not in their own nature, and absolute existence particular. To this hard question I shall return the best answer I can.