I believe that my habits of meditation have so formed my feelings, as that my descriptions of such objects as strongly excite those feelings, will be found to carry along with them a purpose. If in this opinion I am mistaken, I can have little right to the name of a Poet. For all good poetry is the spontaneous overflow of powerful feelings: but though this be true, Poems to which any value can be attached, were never produced on any variety of subjects but by a man, who being possessed of more than usual organic sensibility, had also thought long and deeply. For our continued influxes of feeling are modified and directed by our thoughts, which are indeed the representatives of all our past feelings; and, as by contemplating the relation of these general representatives to each other we discover what is really important to men, so, by the repetition and continuance of this act, our feelings will be connected with important subjects, till at length, if we be originally possessed of much sensibility, such habits of mind will be produced, that, by obeying blindly and mechanically the impulses of those habits, we shall describe objects, and utter sentiments, of such a nature and in such connection with each other, that the understanding of the being to whom we address ourselves, if he be in a healthful state of association, must necessarily be in some degree enlightened, and his affections ameliorated. -- Wordsworth, 'Preface' to Lyrical Ballads (1802)

I have said that Poetry is the spontaneous overflow of powerful feelings: it takes its origin from emotion recollected in tranquillity: the emotion is contemplated till by a species of reaction the tranquillity gradually disappears, and an emotion, kindred to that which was before the subject of contemplation, is gradually produced, and does itself actually exist in the mind. In this mood successful composition generally begins, and in a mood similar to this it is carried on; but the emotion, of whatever kind and in whatever degree, from various causes is qualified by various pleasures, so that in describing any passions whatsoever, which are voluntarily described, the mind will upon the whole be in a state of enjoyment. - Wordsworth, 'Preface' to Lyrical Ballads (1802)

My own conclusions on the nature of poetry, in the strictest use of the word, have been in part anticipated in the preceding disquisition on the fancy and imagination. What is poetry? is so nearly the same question with, what is a poem? that the answer to the one is involved in the solution of the other. For it is a distinction resulting from the poetic genius itself, which sustains and modifies the images, thoughts, and emotions of the poet's own mind. A poet, described in ideal perfection, brings the whole soul of man into activity, with the subordination of its faculties to each other, according to their relative worth and dignity. He diffuses a tone, and spirit of unity, that blends, and (as it were) fuses, each into each, by that synthetic and magical power, to which we have exclusively appropriated the name of imagination. This power, first put in action by the will and understanding, and retained under their irremissive, though gentle and unnoticed, control (laxis effertur habenis [it is carried onwards with loose reins]) reveals itself in the balance or reconciliation of opposite or discordant qualities: of sameness, with difference; of the general, with the concrete; the idea, with the image; the individual, with the representative; the sense of novelty and freshness, with old and familiar objects; a more than usual state of emotion, with more than usual order; judgement ever awake and steady self-possession, with enthusiasm and feeling profound or vehement; and while it blends and harmonizes the natural and the artificial, still subordinates art to nature; the manner to the matter; and our admiration of the poet to our sympathy with the poetry. - Coleridge, Biographia Literaria (1817), chapter xiv

2 April, 1811 - An argument that suggested itself to me against the immortality . . . All passions have a tendency to make us think them lasting, & for ever - Love, for instance - but what is the feeling of Life, but a feeling which when thought of, involves all others - in giving man therefore prospective Thoughts, any future at all, Nature compels him to think himself immortal - especially, when to this we add the unimaginability of passing from Something to Nothing, between which there is no medium . . . or of beliving in a negative - & this too, a negative of that Positive which is the perpetual presence of our Being, and the menstruum of all our Thoughts, Feelings, Acts, & Experiences. - Coleridge, Notebooks

The object of poetry is confessedly to act upon the emotions;---and therein is poetry sufficiently distinguished from what Wordsworth affirms to be its logical opposite---namely, not prose, but matter of fact, or science. The one addresses itself to the belief; the other, to the feelings. The one does its work by convincing or persuading; the other, by moving. The one acts by presenting a proposition to the understanding; the other, by offering interesting objects of contemplation to the sensibilities. - John Stuart Mill, 'What is Poetry' (1833)

Poetry and eloquence are both alike the expression or utterance of feeling: but, if we may be excused the antithesis, we should say that eloquence is heard; poetry is overheard. Eloquence supposes an audience. The peculiarity of poetry appears to us to lie in the poet's utter unconsciousness of a listener. Poetry is feeling confessing itself to itself in moments of solitude, and embodying itself in symbols which are the nearest possible representations of the feeling in the exact shape in which it exists in the poet's mind. Eloquence is feeling pouring itself out to other minds, courting their sympathy, or endeavoring to influence their belief, or move them to passion or to action. - John Stuart Mill, 'What is Poetry' (1833)

The glorious art of poetry is a kind of medicine divinely bestowed on man: which gives healing relief to secret mental emotion, yet without detriment to modest reserve. - John Keble, Lectures on Poetry (1832-41)