there's the rub

there's the rub

Here is the problem (with the situation being discussed). Seen in many different variations, including "here's the rub," "that's the rub," and "therein lies the rub," the phrase was famously used in Shakespeare's Hamlet. A: "All you need to do to get your car back is pay the fine." B: "But there's the rub: my wallet is in my car."
See also: rub

there's the rub

or

therein lies the rub

OLD-FASHIONED
COMMON You say there's the rub or therein lies the rub when you are stating what is difficult, impossible or unfair about a situation. If you are in a hurry, you can get straight onto the train and buy a ticket on board but you can only buy a single ticket — not a return — and there's the rub. She claims she is seen as `a ferocious, man-hating feminist' but therein lies the rub. Women often imagine they are being criticized when they are not. Note: This expression is variable and people sometimes use structures such as here's the rub or there lies the rub. When there are fewer orders, staff will work as little as 28 hours a week. When demand increases, workers will have to do an extra 10 hours. But here's the rub. They will get no extra cash for it. Note: This is from the well-known speech that begins `to be or not to be' in Shakespeare's play `Hamlet', act 3 scene 1, when Hamlet is wondering whether or not to commit suicide: `To die, to sleep; To sleep, perchance to dream. Ay there's the rub; For in that sleep of death what dreams may come...'
See also: rub
References in classic literature ?
Ay, there's the rub, Tom; one is obliged in our business to put up with the SECOND class.
Too many people, too much greed, and too much waste--aye, there's the rub.
But, ah, there's the rub immediately, because my modem is almost certainly too old.
And there's the rub, if you want to look retro cool - why not just buy an older car?
Fans will be able to see the legendary band, who are renowned for albums including Argus, There's the Rub and New England, at Blackwood Miners' Institute on Saturday, October, 8 with doors opening at 7.
And there's the rub, because ITV should be producing first class drama - as it did with Downton Abbey.
But there's the rub - Edith's Boy has a more difficult stall to deal with if he's to dominate today's field and the aforementioned Buy On The Red (handily drawn in stall two) and Silver Prelude are both capable of putting it up to him early doors.
And there's the rub, because both of these metrics need time to be read with the sort of confidence required to convince senior management in Blackfriars.
I could give you a list of 10 players who, if only the evidence could stick, would spend less time worrying about drop shots and more time fretting over mug-shots - but there's the rub.
There's the rub of being the same man who wrote ``Danny and the Deep Blue Sea,'' ``Beggars in the House of Plenty,'' ``Four Dogs and a Bone'' and, most recently, the Pulitzer Prize-winning ``Doubt.
And there's the rub for those who are in the middle, because middle-market products--be they Kraft macaroni and cheese or Chevrolets, two examples Silverstein cites--have a difficult time of making themselves sufficiently distinctive from the products offered at the lower end.
Ah, but there's the rub with some others, specifically physicist Michio Kaku and Bruce Gagnon, coordinator of the Global Network Against Weapons and Nuclear Power in Space (which makes no attempt, as far as we can tell, to fashion a catchy acronym from that title).
But there's the rub, The founders of NAS sought to create a revolutionary education organization that would break with the "failed policies" and tired ideas of the education establishment.
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