I shall show more fully that our definitions of what is poetry and what is a poem have been faulty. The error is so perceptible that it is surprising that so few critics have detected it. Meanwhile I will give my definitions: _Poetry is not a department of literature in the sense that the novel or the essay or the drama is, but is an atmosphere which bathes literature whenever ecstasy and emotion are present. It is not a distinct division of art as literature, music or painting is, for poetry is the very essence of all these arts whether it is transmitted by words, sounds or colors. It is the ecstatic emotional spirit which pervades all good literature (or any of the arts) whether in verse or prose, in their finest parts. It is an aesthetic quality which gives tone to a literary work or any portion or portions of it. It may exist without figures of speech, rhyme, metre or rhythm. Its most natural language is prose or free verse._ Let us have no more such classification of literature as fiction, drama, essay, criticism, _poetry_, etc. There is fiction in verse and there is prose fiction; there are verse dramas and prose plays, etc., and any of these may be steeped in poetry. However, the customary lyric verse may be comprised under the heading of poetry not because of the measure, but on account of the poetic emotion that usually characterizes it. Let us also not speak of the arts like music, painting, sculpture and poetry when instead of the last we mean literature, for poetry is a quality of all the arts including literature. Poetry is the spirit of ecstasy and emotion which pervades the arts like music, painting, sculpture and literature, and hence it may be found in every branch of literature whether in verse or prose, like the drama, fiction and the essay. We are now in a position to define what a poem is. Critics are agreed that it must consist of the artistic expression of words which arouse the reader's emotion, but they have insisted that these words be rhythmically arranged. I think if the latter limitation is withdrawn, all our confusion as to what is a poem will disappear. _A poem is any literary composition, whether in verse or prose, which as a whole is an imaginative creation, a vehicle of emotion, an expression of ecstasy; or that portion or every portion of such a composition where the emotion or ecstasy has been concentrated. It does not follow that the work as a whole is necessarily poetry. Its most natural language is prose or free verse._ Poems may therefore be found in imaginative philosophical works like Plato's _Symposium_, _Phaedrus_,