“Truth is a standard both of itself and of falsity”
Part II, Prop. XLIII, Scholium
Ethics (1677)
Original
veritas norma sui et falsi est
Help us to complete the source, original and additional information
Baruch Spinoza 210
Dutch philosopher 1632–1677Related quotes

“Contradiction is not a sign of falsity, nor the lack of contradiction a sign of truth.”

Source: "On Truth," 1934, p. 28 (1961 edition)

Source: Triton (1976), Chapter 7 “Tiresias Descending, or Trouble on Triton” (p. 329)

Gemba Kaizen: A Commonsense Approach to a Continuous Improvement Strategy, Second Edition (ed. McGraw Hill Professional, 2012), ISBN 9780071790352

“In truth, the gold standard is already a barbarous relic.”
A Tract on Monetary Reform (1923), p. 172
Context: Those who advocate the return to a gold standard do not always appreciate along what different lines our actual practice has been drifting. If we restore the gold standard, are we to return also to the pre-war conceptions of bank-rate, allowing the tides of gold to play what tricks they like with the internal price-level, and abandoning the attempt to moderate the disastrous influence of the credit-cycle on the stability of prices and employment? Or are we to continue and develop the experimental innovations of our present policy, ignoring the "bank ration" and, if necessary, allowing unmoved a piling up of gold reserves far beyond our requirements or their depletion far below them? In truth, the gold standard is already a barbarous relic.

Falsch am Positivismus ist, daß er die nun einmal gegebene Arbeitsteilung, die der Wissenschaften von der gesellschaftlichen Praxis und die innerhalb der Wissenschaft, als Maß des Wahren supponiert und keine Theorie erlaubt, welche die Arbeitsteilung selbst als abgeleitet, vermittelt durchsichtig machen, ihrer falschen Autorität entkleiden könnte.
Source: Wozu noch Philosophie? [Why still philosophy?] (1963), p. 10

1910s, Citizenship in a Republic (1910)