I found that quote in Strunk and White's "Elements of Style". Sounded like a funny thing for a grammar book to be saying, but it really touched a chord with me.
Some of the most moving words I've read, whether they were poetry, song lyrics or prose, weren't grammatically correct. (Any lovers of country and western music will be agreeing with me here) But when I've read those words or heard them, they've gone past my intellect and straight into my heart, touching something there that affected me profoundly.
I have no idea how that happens, but I don't think it's technique. Certainly a writer needs craft and needs to be able to write with clarity, but the sort of writing that touches your soul is more than literary bookkeeping.
Just thought I'd toss that in here - something for the aspiring authors to think about - not editing your book as though you're trying to please your eighth grade English teacher, but simply dusting off the rough diamonds you find and leaving them where they lie for everyone else to discover and enjoy.