To tell the truth, I myself never quite feel that I know what I am talking about — if I did, and when I do, the thing written seems nothing to me. However, what I do write and allow to survive I always feel is worth while and that nobody else has ever come as near as I have to the thing I have intimated if not expressed. To me it's a matter of first understanding that which may not be put to words. I might add more but to no purpose. In a sense, I must express myself, you're right, but always completely incomplete if that means anything.

To Harriet Monroe (14 October 1913), published in The Selected Letters of William Carlos Williams (1957) edited by John C. Thirlwall, p. 26