therein lies the rub

== English == === Alternative forms === there lies the rub, there is the rub === Etymology === A misquotation or paraphrasing from Shakespeare's Hamlet: "ay, there's the rub". === Phrase === therein lies the rub (idiomatic) That is where the problem is found or located. I tried to back up my database to a USB flash drive, but it isn't big enough. Therein lies the rub. ==== Translations ==== === See also === === Further reading === “there s here s the rub” in Longman Dictionary of Contemporary English, Longman. “therein lies the rub”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present. “theres the rub”, in Collins English Dictionary.