
“Man as man can never know God: His wishing, seeking, and striving are all in vain.”
In "Karl Barth's Conception of God" (1952) http://mlk-kpp01.stanford.edu/primarydocuments/Vol2/520102BarthsConceptionOfGod.pdf by Martin Luther King, Jr., King cites this as a statement of Barth's in The Epistle to the Romans, p. 91, but it does not actually appear in the 1933 translation of Edwin Hoskyns. It may be a paraphrase of some of Barth's ideas which were incorrectly cited.
Disputed