The Divine Inspiration of the Muse

I found out today that a phrase I thought I had invented all on my own is in fact a literary cliche and has it's own wikipedia page to explain this and is even the title of several famous poems, including one by Walt Whitman. I won't say what it is because you'll probably laugh, but suffice to say it is something like the word dappled (according to wikipedia anyway). So I guess I've read it somewhere, - it sounds like it would be impossible not to - assimilated it and then promptly destroyed all the neural pathways linking it to anything else, so that when I was writing that poem it popped in there fooling me into thinking I'd had some kind of divine creative moment. Which I guess begs the question, do divine creative moment actually exist? Or are they just cliches that no one else has heard of? Do things only ever come in to being in a creative way by accident, typos, chance operations like Jackson Mac Low and others would have us believe?

I'm sure there is some message about artistic stealing and originality in there, but I don't know what it is or how it is supposed to help me. Anyone?