“A reliable way to make people believe in falsehoods is frequent repetition, because familiarity is not easily distinguished from truth.”
Source: Thinking, Fast and Slow (2011), Chapter 5, "Cognitive ease", page 62 (ISBN 9780141033570).
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Daniel Kahneman 51
Israeli-American psychologist 1934Related quotes

The Deliverance from Error https://www.amazon.com/Al-Ghazalis-Path-Sufism-Deliverance-al-Munqidh/dp/1887752307

“The way to combat noxious ideas is with other ideas. The way to combat falsehoods is with truth.”
Mike Wallace interview (4 November 1958), quoted in The Great Quotations (1966) by George Seldes
Other speeches and writings

“Truth here makes Falsehood torment lying tongues.”
The Notebooks of Leonardo da Vinci (1883), X Studies and Sketches for Pictures and Decorations

"Fifth Talk in Bombay 1950 (12 March 1950) http://www.jkrishnamurti.com/krishnamurti-teachings/view-text.php?tid=352&chid=4672&w=%22Truth+is+not+something+in+the+distance%22, J.Krishnamurti Online, JKO Serial No. 500312, The Collected Works, Vol. VI, p. 134
Posthumous publications, The Collected Works
Context: Truth is not something in the distance; there is no path to it, there is neither your path nor my path; there is no devotional path, there is no path of knowledge or path of action, because truth has no path to it. The moment you have a path to truth, you divide it, because the path is exclusive; and what is exclusive at the very beginning will end in exclusiveness. The man who is following a path can never know truth because he is living in exclusiveness; his means are exclusive, and the means are the end, are not separate from the end. If the means are exclusive, the end is also exclusive. So there is no path to truth, and there are not two truths. Truth is not of the past or the present, it is timeless; the man who quotes the truth of the Buddha, of Shankara, of Christ, or who merely repeats what I am saying, will not find truth, because repetition is not truth. Repetition is a lie.

The one-sentence peace message summarizing her ideas. Ch. 3 : The Pilgrimage
Peace Pilgrim: Her Life and Work in Her Own Words (1982)

Source: A Way to Be Free: The Autobiography of Robert LeFevre, Volume I, (1999), p. 19

“Cling to truth and it turns into falsehood. Understand falsehood and it turns into truth.”
As translated in 1,001 Pearls of Wisdom (2006) by David Ross, p. 36
Context: Cling to truth and it turns into falsehood. Understand falsehood and it turns into truth. Truth and falsehood are two sides of the same coin. Neither accept one nor reject the other.