“Each work has to pass through these stages—ridicule, opposition, and then acceptance. Those who think ahead of their time are sure to be misunderstood.”

Sir Vince Cable: Governments assume public are 'pretty bigoted' https://www.bbc.co.uk/news/uk-politics-43941383, BBC News, 29 April 2018
2018

As quoted in Power for the World (2010) by Wolfgang Palz, Foreword, p. xxi

Message to the Tricontinental (1967)
Context: Each spilt drop of blood, in any country under whose flag one has not been born, is an experience passed on to those who survive, to be added later to the liberation struggle of his own country. And each nation liberated is a phase won in the battle for the liberation of one's own country.

Journal of Genetics Vol. 58, page 464 (1963).
Haldane may have been putting his own twist on a phrase he had heard elsewhere, since similar statements can be found earlier. On p. 113 of The Art of Scientific Investigation http://www.archive.org/stream/artofscientifici00beve#page/112/mode/2up (1955), William Ian Beardmore Beveridge wrote: <blockquote>It has been said that the reception of an original contribution to knowledge may be divided into three phases: during the first it is ridiculed as not true, impossible or useless; during the second, people say that there may be something in it but it would never be of any practical use; and in the third and final phase, when the discovery has received general recognition, there are usually people who say that it is not original and has been anticipated by others.</blockquote>
A note at the bottom of the page adds that "This saying seems to have originated from Sir James Mackenzie (The Beloved Physician, by R. M. Wilson, John Murray, London)". In addition, on p. 366 of "The Accident Prevention Problem in the Small Shop" in Safety Engineering Vol. 33 (1950), Earl B. Morgan wrote: <blockquote>First, it is ridiculed; second, it is subject to argument: third, it is accepted.</blockquote>
A similar quote is also often attributed to Arthur Schopenhauer but this is likely incorrect since it does not appear in any of his published writings.

2011, Tucson Memorial Address (January 2011)

Nobel Prize acceptance speech (1962)
Context: Humanity has been passing through a gray and desolate time of confusion. My great predecessor, William Faulkner, speaking here, referred to it as a tragedy of universal fear so long sustained that there were no longer problems of the spirit, so that only the human heart in conflict with itself seemed worth writing about.
Faulkner, more than most men, was aware of human strength as well as of human weakness. He knew that the understanding and the resolution of fear are a large part of the writer's reason for being.
This is not new. The ancient commission of the writer has not changed. He is charged with exposing our many grievous faults and failures, with dredging up to the light our dark and dangerous dreams for the purpose of improvement.

Emancipation (1840)

Le Coq et l’Arlequin (1918)