"I did not want to say these unpleasant things, but you have written to me, asking my opinion, and I give it to you, flat. If you would get over two ideas — first that any one who criticizes you is an evil and capitalist-controlled spy, and second that you have only to spend a few weeks on any subject to become a master of it — you might yet regain your now totally lost position as the leader of American socialistic journalism."
January 1, 1970
https://en.wikiquote.org/wiki/Upton_Sinclair