From an interview with Robert Bly on Three Dog Blog:
I can't tell you what we talked about; I need to
save that for my story. But I will share his last quote,
since it was so lovely. I said, Why poetry? Why not prose?
And he answered immediately; he said,
Why dancing? Why not just walk around?
That says it! (And I'll admit that I dance
like a broken egg-beater, but I seem to have
had a bit more success whisking up poems
into stiff peaks.)