to propound, a science to explain, a system to uphold. Though the heart be large, yet the mind--as Nathaniel Hawthorne somewhere observes--is often of such moderate dimensions, as to be exclusively filled up with one idea; and thus, when a good man has long devoted himself to a particular kind of beneficence, to one species of reform, he is apt to become narrowed into the limits of the path wherein he treads, and to fancy that there is no other good to be done on earth but that selfsame good to which he has put his hand, and in the very mode that best suits his own conceptions. 'All else is worthless; his scheme must be wrought out by the united strength of the whole world's stock of love, or the world is no longer worthy of a position in the universe. Moreover, powerful truth, being the rich grape-juice expressed from the vineyard of the ages, has an intoxicating quality when imbibed by any but a powerful intellect, and often, as it were, impels the quaffer to quarrel in his cups.' Even a saint with one idea may be a plague to his neighbourhood; and, by being canonised, may retard, not further, the progress of his church. Let us own, however, that one-idea'd people are often amusing as well as mischievous--or rather, when not mischievous. The rapt devotion they pay to their _idola specus_ oscillates between the sublime and the ridiculous. We have all seen such people, and alternately admired and laughed at them. We have all witnessed or read pleasant illustrations of their doings. With one such illustration we conclude this discursive fragment. It is related by the witty author of _A Defence of Ignorance_, who introduces it in the course of an imaginary dialogue on one-sided university training, in which one of the speakers (at dessert) says to his companion: 'If you reach after that pear, without considering what stands against your elbows, you may empty a decanter over me. He who desires thoroughly to know one subject, should be possessed of so much intellectual geography as will enable him to see its true position in the universe of thought.' The allusion to upsetting a decanter reminds the other interlocutor of a story, which he proceeds to tell. A gentleman who carved a goose was inexpert; and thinking only of the stubborn joints that would not be unhinged, he totally forgot the gravy. Presently, the goose slipped off the dish, and escaped into his neighbour's lap. Now, to have thrown a hot goose on a lady's lap would disconcert most people, but the gentleman in question was _not_ disconcerted. Turning round, with a bland smile, he said: 'I'll trouble you for that goose.' Here we have a sublime example of a man with one idea. This gentleman's idea was the goose; and in the absorbing interest attached to his undertaking, that he was to carve the goose, not altogether knowing how, he had shut out extraneous objects. Suddenly the goose was gone, but his eye followed it, his mind was wrapt up in his struggle with