We pardon thinkers and men of science their literary mediocrity. The fragments, the flashes, console us for the whole, because it is far easier to recover the well-arranged composition from the fragmentary work of genius, to liberate the flame latent in the spark, than to achieve the discovery of genius. But how can we pardon mediocre expression in pure artists? "_Mediocribus esse poetis non di, non homines, non concessere columnae_" The poet or painter who lacks form, lacks everything, because he lacks _himself._ Poetical material permeates the souls of all: the expression alone, that is to say, the form, makes the poet. And here appears the truth of the view which denies all content to art, just the intellectual concept being understood as content. In this sense, when we take "content" as equal to "concept" it is most true, not only that art does not consist of content, but also that _it has no content._ [Sidenote: _Content and form: another meaning. Prose and poetry._] The distinction between _poetry and prose_ also cannot be justified, save as that between art and science. It was seen in antiquity that such distinction could not be founded on external elements, such as rhythm and metre, or on rhymed or unrhymed form; that it was, on the contrary, altogether internal. Poetry is the language of feeling, prose of the intellect; but since the intellect is also feeling, in its concreteness and reality, all prose has its poetical side. [Sidenote: _The relation of first and second degree._] The relation between intuitive knowledge or expression and intellectual knowledge or concept, between art and science, poetry and prose, cannot be otherwise defined than by saying that it is one of _double degree._ The first degree is the expression, the second the concept: the first can stand without the second, but the second cannot stand without the first. There is poetry without prose, but not prose without poetry. Expression, indeed, is the first affirmation of human activity. Poetry is "the mother tongue of the human race"; the first men "were by nature sublime poets." We assert this in another way, when we observe that the passage from soul to spirit, from animal to human activity, is effected by means of language. And this should be said of intuition or expression in general. But to us it appears somewhat inaccurate to define language or expression as an _intermediate_ link between nature and humanity, as though it were a mixture of both. Where humanity appears, the other has already disappeared; the man who expresses himself, certainly emerges from the state of nature, but he really does emerge: he does not stand half within and half without, as the use of the phrase "intermediate link" would imply. [Sidenote: _Non-existence of other forms of knowledge._] The cognitive spirit has no form other than these two. Expression and concept exhaust it completely. The whole speculative life of man is spent in passing from one to the other and back again.