In its use of words poetry is just the reverse of science. Very definite thoughts do occur, but not because the words are so chosen as logically to bar out all possibilities but one. No. But because the manner, the tone of voice, the cadence and the rhythm play upon our interests and make _them_ pick out from among an indefinite number of possibilities the precise particular thought which they need. This is why poetical descriptions often seem so much more accurate than prose descriptions. Language logically and scientifically used cannot describe a landscape or a face. To do so it would need a prodigious apparatus of names for shades and nuances, for precise particular qualities. These names do not exist, so other means have to be used. The poet, even when, like Ruskin or De Quincey, he writes in prose, makes the reader pick out the precise particular sense required from an indefinite number of possible senses which a word, phrase or sentence may carry. The means by which he does this are many and varied. Some of them have been mentioned above, but the way in which he uses them is the poet’s own secret, something which cannot be taught. He knows how to do it, but he does not himself know how it is done. Misunderstanding and under-estimation of poetry is mainly due to over-estimation of the thought in it. We can see still more clearly that thought is not the prime factor if we consider for a moment not the experience of the reader but that of the poet. Why does the poet use these words and no others? Not because they stand for a series of thoughts which in themselves are what he is concerned to communicate. It is never what a poem _says_ which matters, but what it _is_. The poet is not writing as a scientist. He uses these words because the interests which the situation calls into play combine to bring them, just in this form, into his consciousness _as a means of ordering, controlling and consolidating_ the whole experience. The experience itself, the tide of impulses sweeping through the mind, is the source and the sanction of the words. They represent this experience itself, not any set of perceptions or reflections, though often to a reader who approaches the poem wrongly they will seem to be only a series of remarks about other things. But to a suitable reader the words--if they actually spring from experience and are not due to verbal habits, to the desire to be effective, to factitious excogitation, to imitation, to irrelevant contrivances, or to any other of the failings which prevent most people from writing poetry--the words will reproduce in his mind a similar play of interests putting him for the while into a similar situation and leading to the same response.