The verification test used by Rumi scholars is not a matter of taste. As Ibrahim Gamard sets it out in Three Fake Rumi Verses ↗, a candidate verse is checked against the earliest Persian manuscripts of Rumi’s Divan, with Furūzānfar’s ten-volume critical edition as the standard reference. A verse with no equivalent there is not Rumi’s, however Rumi-ish it sounds. That test has retired several of the most famous “Rumi” lines in English, including “Come, come, whoever you are”, which Gamard reports scholars assign to a quatrain by Abu Sa’id ibn Abi’l-Khayr.
For the same reason, much of what the general reader “knows” about Rumi has needed correcting by specialists. Gamard’s Common Misconceptions About Rumi ↗, drawing throughout on Franklin Lewis’s Rumi: Past and Present, East and West, works through claims as basic as where the family actually lived — Vakhsh rather than Balkh — and whether Rumi ever met the poet ‘Attar. If the biography needs that much repair, the quotations deserve at least as much scepticism.