William Stafford:

Writers have many things to be careful not to know -- and strangely one of the things not to know is how to write. Sometimes writers who have wandered into good poems have become too adept. Auden was one. Someplace he said he feared repeating himself as the years went by, and this fear shocked me, for it undercut a view I have long cherished -- that a writer is not trying for a product, but accepting sequential signals and adjustments toward an always-arriving present.

Writing the Australian Crawl, p. 66