Historical experience merits attention. Line and viewpoint must be talked
over constantly and repeatedly. It won’t do to talk them over with only a few
people; they must be made known to all the revolutionary masses.
325  Lin Biao quoted Mao saying this comes from his talk of October 1968, without more
precision. It’s possible that it comes from the Enlarged Twelfth Plenary Session of the Eighth
Central Committee of the Communist Party of China