{240} There is great diversity of trains. Not only has the same individual an endless variety of trains; but a different character belongs to the whole series of trains which pass through the minds of different individuals or classes of individuals. The different pursuits in which the several classes of men are engaged, render particular trains of ideas more common to them than other trains. One man is a merchant; and trains respecting the goods in which he deals, the markets in which he buys, and those in which he sells, are habitual in his mind. Another man is a lawyer, and ideas of clients, and fees, and judges, and witnesses, and legal instruments, and points of contestation, and the practice of his court, are habitually passing in his mind. Ideas of another kind occupy the mind of the physician; of another kind still, the mind of the warrior. The statesman is occupied with a train different from that of any of the classes that have been mentioned; and one statesman with a very different train from another, according as his mind is running upon expedients which may serve the purpose of the day, or arrangements which may secure the happiness of the population from generation to generation. A peculiar character belongs to the train which habitually occupies the mind of the mathematician. The mind of the metaphysician is also occupied by a train distinguished from that of other classes. And there is one man, yet to be mentioned, the poet, the peculiarity of whose trains has been a subject of particular observation. To such a degree, indeed, have the trains of the poet been singled out for distinction, that the word Imagination, in a more restricted sense, is appropriated to them. We do not {241} call the trains of the lawyer, or the trains of the merchant, imagination. We do not speak of them as imagining, when they are revolving, each, the ideas which belong to his peculiar occupation; it is only to the poet, that the epithet of imagining is applied. His trains, or trains analogous to his, are those which receive the name of Imagination. It is then a question, to which we should find an answer, whether, in that by which the trains of the poet differ from the trains of other men, there be any thing which, being wholly absent from that by which the trains of other classes are distinguished, lays a foundation for this peculiarity of naming.