desperately seeking Zukofsky

well, not 'desperately' really, but I've been trying to locate the (or an) exact quote from Louis Zukofsky where he wrote, or is said to have written, or I half-remembered that he did write or someone said he wrote, that somehow, all one's life one (or the poet) writes just one poem - if anyone can direct me to a direct quotation from Zukofsky's writings where he writes such a thing, please let me know - many thanks. . .