The familiar distinction between the poetic and the scientific temper is another way of stating the same difference. The one fuses or crystallises external objects and circumstances in the medium of human feeling and passion; the other is concerned with the relations of objects and circumstances among themselves, including in them all the facts of human consciousness, and with the discovery and classification of these relations. There is, too, a corresponding distinction between the aspects which conduct, character, social movement, and the objects of nature are able to present, according as we scrutinise them with a view to exactitude of knowledge, or are stirred by some appeal which they make to our various faculties and forms of sensibility, our tenderness, sympathy, awe, terror, love of beauty, and all the other emotions in this momentous catalogue. The starry heavens have one side for the astronomer, as astronomer, and another for the poet, as poet. The nightingale, the skylark, the cuckoo, move one sort of interest in an ornithologist, and a very different sort in a Shelley or a Wordsworth. The hoary and stupendous formations of the inorganic world, the thousand tribes of insects, the great universe of plants, from those whose size and form and hue make us afraid as if they were deadly monsters, down to 'the meanest flower that blows,' all these are clothed with one set of attributes by scientific intelligence, and with another by sentiment, fancy, and imaginative association.