“We all know that Art is not truth. Art is a lie that makes us realize truth, at least the truth that is given us to understand. The artist must know the manner whereby to convince others of the truthfulness of his lies. If he only shows in his work that he has searched, and re-searched, for the way to put over lies, he would never accomplish anything.”
Source: 1920s, "Picasso Speaks" (1923), p. 315.
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Pablo Picasso 128
Spanish painter, sculptor, printmaker, ceramicist, and stag… 1881–1973Related quotes

“Art is the lie that enables us to realize the truth.”

“The pleasure lies not in discovering truth, but in searching for it.”
Source: Anna Karenina

This Business of Living (1935-1950)
Source: The Meaning of God in Human Experience (1912), Ch. XIV : The Need of an Absolute, p. 192.
Context: As in reply to the skeptic or agnostic, who asserts in despair that there is no absolute truth. The dialectician retorts: Then at least your own assertion must be absolutely true. There must be some absolute truth, for you cannot assert that there is none without self-contradiction. As in Descartes' case, the doubter is reminded of himself. There, in his own assertion, is a certainty from which he cannot escape.
This turn of thought which reminds the enquirer of himself, we shall call the reflexive turn. It reappears in all discoveries of the Absolute. It is clinching--but is likely to disappoint, even as Descartes' result disappoints. For the skeptic finds that he also was in search of objective truth: and that the absolute truth of his statement is irrelevant to his quest. Whence his skepticism toward objective truth remains unanswered.

Boris Johnson insists he is 'all behind' May over Brexit https://www.bbc.co.uk/news/uk-politics-41289080 BBC News (16 September 2017)
2017

On Truth and Lie in an Extra-Moral Sense (1873)