The infant does not learn to spell and read the hues upon his retina by any scientific rule; nor does the student learn accuracy of thought by any manual or treatise. The instruction given him, of whatever kind, if it be really instruction, is mainly, or at least pre-eminently, this,—a discipline in accuracy of mind. Boys are always more or less inaccurate, and too many, or rather the majority, remain boys all their lives. When, for instance, I hear speakers at public meetings declaiming about “large and enlightened views,” or about “freedom of conscience,” or about “the Gospel,” or any other popular subject of the day, I am far from denying that some among them know what they are talking about; but it would be satisfactory, in a particular case, to be sure of the fact; for it seems to me that those household words may stand in a man’s mind for a something or other, very glorious indeed, but very misty, pretty much like the idea of “civilization” which floats before the mental vision of a Turk,—that is, if, when he interrupts his smoking to utter the word, he condescends to reflect whether it has any meaning at all. Again, a critic in a periodical dashes off, perhaps, his praises of a new work, as “talented, original, replete with intense interest, irresistible in argument, and, in the best sense of the word, a very readable book;”—can we really believe that he cares to attach any definite sense to the words of which he is so lavish? nay, that, if he had a habit of attaching sense to them, he could ever bring himself to so prodigal and wholesale an expenditure of them? To a short-sighted person, colours run together and intermix, outlines disappear, blues and reds and yellows become russets or browns, the lamps or candles of an illumination spread into an unmeaning glare, or dissolve into a milky way. He takes up an eye-glass, and the mist clears up; every image stands out distinct, and the rays of light fall back upon their centres. It is this haziness of intellectual vision which is the malady of all classes of men by nature, of those who read and write and compose, quite as well as of those who cannot,—of all who have not had a really good education. Those who cannot either read or write may, nevertheless, be in the number of those who have remedied and got rid of it; those who can, are too often still under its power. It is an acquisition quite separate from miscellaneous information, or knowledge of books. This is a large subject, which might be pursued at great length, and of which here I shall but attempt one or two illustrations. § 1. Grammar. 1.