愛倫坡是偵探小說(detective story)鼻祖、科幻小說(science fiction)先驅之一、恐怖小說(horror fiction)大師、短篇哥特小說巔峰、象征主義(symbolism)先驅之一，唯美主義(aestheticism)者。受到過愛倫·坡影響的主要人物有：柯南·道爾、波德萊爾、斯特芳·馬拉美、儒勒·凡爾納、羅伯特·路易斯·斯蒂文森、希區柯克、蒂姆·伯頓、江戶川亂步等。愛倫·坡最著名的文藝理論是“效果論”。坡力圖在自己的作品中先確立某種效果，再為追求這種效果而思考創作。他在《怪異故事集》序中稱“自己的作品絕大部分都是深思熟慮的苦心經營”。

Hey, diddle diddle,The cat and the fiddle From an Epic by "Flaccus."

Since the world began there have been two Jeremys. The one wrote a Jeremiad about usury, and was called Jeremy Bentham. He has been much admired by Mr. John Neal, and was a great man in a small way. The other gave name to the most important of the Exact Sciences, and was entitled Jeremy Diddler. He was a great man in a great way — I may say, indeed, in the very greatest of ways.

Diddling — or the abstract idea conveyed by the verb to diddle — is sufficiently well understood. Yet the fact, the deed, the thing diddling, is somewhat difficult to define. We may get, however, at a tolerably distinct conception of the matter in hand, by defining — not the thing, diddling, in itself — but man, as an animal that diddles. Had Plato but hit upon this, he would have been spared the affront of the picked chicken.

Very pertinently it was demanded of Plato, why a picked chicken, which was clearly "a biped without feathers," was not, according to his own definition, a man? But I am not to be bothered by any similar query. Man is an animal that diddles, and there is no animal that diddles but man. It will take an entire hen-coop of picked chickeus [[chickens]] to get over that.

What constitutes the essence, the ware, the principle of diddling is, in fact, peculiar to the class of creatures that wear coats and pantaloons. A crow thieves; a fox cheats; a weasel outwits; a man diddles. To diddle is his destiny. "Man was made to mourn," says the poet. But not so: — he was made to diddle. This is his aim — his object — his end. And for this reason when a man’s diddled we say he’s "done."

Diddling, rightly considered, is a compound, of which the ingredients are minuteness, interest, perseverance, ingenuity, audacity, nonchalance, originality, impertinence, and grin.

Minuteness: — Your diddler is minute. His operations are upon a small scale. His business is retail, for cash, or approved paper at sight. Should he ever be tempted into magnificent speculation, he then, at once, loses his distinctive features, and becomes what we term "financier." This latter word conveys the diddling idea in every respect except that of magnitude. A diddler may thus be regarded as a banker in petto — a "financial operation," as a diddle at Brobdignag. The one is to the other as a Mastodon to a mouse — as the tail of a comet to that of a pig — as Homer to Flaccus — as the "Iliad" to "Sam Patch.".

Interest: — Your diddler is guided by self-interest. He scorns to diddle for the mere sake of the diddle. He has an object in view — his pocket — and yours. He regards always the main chance. He looks to Number One. You are Number Two, and must look to yourself.

Perseverance: — Your diddler perseveres. He is not readily discouraged. Should even the banks break, he cares nothing about it. He steadily pursues his end, and

Ut camis a corio nunquam absterrebitur uncto, so he never lets go of his game.