It's all in the translation. For Rumi it's Coleman Barks and John Moyne--The Essential Rumi.
For Hafiz it's Daniel Landinsky; the book is called the Gift.
I would also recommend Kabir. The Ecstatic Poems translated by Robert Bly (of all people) are wonderful. For more of his work, see the fantastic--and closer translations by Indian poet Rabindranath Tagore in The Songs Of Kabir.
Late reply (and discovery), but thank you, thank you! I will look into these! It's not the first time I've come across "the Gift," and thank you for your other reccommendations! I'm sure they mean much to you.
Getting back to the original inquiry, may I highly, highly reccommend other works by Matthew Arnold? His collected poems are available free via Kindle, for those of you. "Morality" is another very good one. He seems beautifully to blend high, lofty ideals with practical, earthly concerns! He is a rare gift.