In lectures, of which amusement forms a large part of the object, there are some peculiar difficulties. The architect places his foundation out of sight, and the musician tunes his instrument before he makes his appearance; but the lecturer has to try his chords in the presence of the assembly; an operation not likely, indeed, to produce much pleasure, but yet indispensably necessary to a right understanding of the subject to be developed. Poetry in essence is as familiar to barbarous as to civilized nations. The Laplander and the savage Indian are cheered by it as well as the inhabitants of London and Paris;--its spirit takes up and incorporates surrounding materials, as a plant clothes itself with soil and climate, whilst it exhibits the working of a vital principle within independent of all accidental circumstances. And to judge with fairness of an author's works, we ought to distinguish what is inward and essential from what is outward and circumstantial. It is essential to poetry that it be "simple" and appeal to the elements and primary laws of our nature; that it be "sensuous" and by its imagery elicit truth at a flash; that it be "impassioned," and be able to move our feelings and awaken our affections. In comparing different poets with each other, we should inquire which have brought into the fullest play our imagination and our reason, or have created the greatest excitement and produced the completest harmony. If we consider great exquisiteness of language and sweetness of metre alone, it is impossible to deny to Pope the character of a delightful writer; but whether he be a poet, must depend upon our definition of the word; and, doubtless, if every thing that pleases be poetry, Pope's satires and epistles must be poetry. This, I must say, that poetry, as distinguished from other modes of composition, does not rest in metre, and that it is not poetry, if it make no appeal to our passions or our imagination. One character belongs to all true poets, that they write from a principle within, not originating in any thing without; and that the true poet's work in its form, its shapings, and its modifications, is distinguished from all other works that assume to belong to the class of poetry, as a natural from an artificial flower, or as the mimic garden of a child from an enamelled meadow. In the former the flowers are broken from their stems and stuck into the ground; they are beautiful to the eye and fragrant to the sense, but their colours soon fade, and their odour is transient as the smile of the planter;--while the meadow may be visited again and again with renewed delight, its beauty is innate in the soil, and its bloom is of the freshness of nature.