
“Practice is the criterion of truth.”
Mao Zedong, "On Practice" (1937)
Misattributed
Source: The Ultimate Foundation of Economic Science (1962), Chapter 5: On Some Popular Errors Concerning the Scope and Method of Economics, § 9 : The Belief in the Omnipotence of Thought
“Practice is the criterion of truth.”
Mao Zedong, "On Practice" (1937)
Misattributed
“My own criterion of success is the ability to work joyfully and to live positively.”
Source: Summerhill (1960), p. 29
Your Job-Hunt Ltd – Advice from an Award-Winning Asian Headhunter (2003), Successful Recruitment in a Week (2012) https://books.google.ae/books?idp24GkAsgjGEC&printsecfrontcover&dqnigel+cumberland&hlen&saX&ved0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIGjAA#vonepage&qnigel%20cumberland&ffalse, 100 Things Successful People Do: Little Exercises for Successful Living (2016) https://books.google.ae/books?idnu0lCwAAQBAJ&dqnigel+cumberland&hlen&saX&ved0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIMjAE
Young India 1924-1926 (1927), p. 1285
1920s
Physics and Philosophy (1958)
Context: The physicist may be satisfied when he has the mathematical scheme and knows how to use for the interpretation of the experiments. But he has to speak about his results also to non-physicists who will not be satisfied unless some explanation is given in plain language. Even for the physicist the description in plain language will be the criterion of the degree of understanding that has been reached.
"Six Asides About Culture"
Living in Truth (1986)
Context: There is only one Art, whose sole criterion is the power, the authenticity, the revelatory insight, the courage and suggestiveness with which it seeks its truth. … Thus, from the standpoint of the work and its worth it is irrelevant to which political ideas the artist as a citizen claims allegiance, which ideas he would like to serve with his work or whether he holds any such ideas at all.
Der thörigste von allen Irrthümern ist, wenn junge gute Köpfe glauben, ihre Originalität zu verlieren, indem sie das Wahre anerkennen, was von andern schon anerkannt worden.
Maxim 254, trans. Stopp
Maxims and Reflections (1833)