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The product of mental labor — science — always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.

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More quotes by Karl Marx

Language comes into being, like consciousness, from the basic need, from the scantiest intercourse with other human.

The German Ideology (1845)

The circulation of capital realizes value, while living labour creates value.

Grundrisse (1857)

History is not like some individual person, which uses men to achieve its ends. History is nothing but the actions of men in pursuit of their ends.

The Holy Family (1845)

Philosophy stands in the same relation to the study of the actual world as masturbation to sexual love.

The German Ideology (1845)

Capital is dead labor, that vampire-like, only lives by sucking living labor, and lives the more, the more labor it sucks.

Das Kapital (Buch I) (1867)

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The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents.

H. P. Lovecraft The Call of Cthulhu (1926)

All religions, arts and sciences are branches of the same tree. All these aspirations are directed toward ennobling man's life, lifting it from the sphere of mere physical existence and leading the individual towards freedom.

Albert Einstein Moral Decay (1937)

Science and religion are two human enterprises sharing many features.

Freeman Dyson Infinite in All Directions (1988)

To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection.

Henri Poincaré Science and Hypothesis (1901)

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Quote text and notes from Wikiquote: Karl Marx (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.