nature of poetry, and who endeavoured to render the rules of an art or science subservient to poetic effect, have seldom succeeded. The inherent, prosaic element preponderated, and the Arts of Poetry, Criticism, Translating Verse, etc. are for the most part dreary compositions which afford as little delight as instruction. Bolingbroke had right conceptions of the characteristics of didactic poetry, and he imparted his views to Pope. "Should the poet," he says, "make syllogisms in verse, or pursue a long process of reasoning in the didactic style, he would be sure to tire his reader on the whole, like Lucretius, though he reasoned better than the Roman, and put into some parts of his work the same poetical fire. He must contract, he may shadow, he has a right to omit whatever will not be cast in the poetic mould, and when he cannot instruct he may hope to please. In short, it seems to me, that the business of the philosopher is to dilate, to press, to prove, to convince, and that of the poet to hint, to touch his subject with short and spirited strokes, to warm the affections, and to speak to the heart."[947] Bolingbroke's theory of poetry was superior to his practical taste. He said that all Pope's writings were pre-eminent for "the happy association of great coolness of judgment with great heat of imagination." "Pope's Essay on Criticism," he says again, "was the work of his childhood almost; but is such a monument of good sense and poetry as no other, that I know, has raised in his riper years."[948] The man who could discover transcendent poetry in the Essay on Criticism, and great heat of imagination in all Pope's writings, could have had but a faint, diluted perception of the imaginative and poetic. His belief that the ethical philosophy of the Essay on Man could be brought under his law of didactic poetry was a fresh instance of his want of insight into the demands both of poetry and philosophy. A system of philosophy cannot be conveyed in elegant extracts. "Every part," says de Quincey, "depends upon every other part: in such a nexus of truths, to insulate is to annihilate. Severed from each other the parts lose their support, their coherence, their very meaning; you have no liberty to reject or choose." It was not enough for Pope to detail his system. He had to vindicate, and establish it. "In his theme," continues De Quincey, "everything is polemic; you move only through dispute, you prosper only by argument and never-ending controversy. There is not positively one capital proposition or doctrine about man, about his origin, his nature, his relations to God, or his prospects, but must be fought for with energy, watched at every turn with vigilance, and followed into endless mazes, not under the choice of the writer, but under the inexorable dictation of the argument. Here lay the impracticable dilemma for Pope's Essay on Man. To satisfy the demands of the subject was to defeat the objects of poetry. To evade the demands in