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Quotation from Ethics by Baruch Spinoza
“PROP. XIII. The object of the idea constituting the human mind is the body, in other words a certain mode of extension which actually exists, and nothing else”
Ethics, Part II, Prop. XIII, trans. R. H. M. Elwes (1883)

The basis of Spinoza's parallelism: the mind is the idea of the body, so mind and body are one thing seen under two attributes.
Citation: "PROP. XIII. The object of the idea constituting the human mind is the body, in other words a certain mode of extension which actually exists, and nothing else" — Baruch Spinoza, Ethics, Part II, Prop. XIII, trans. R. H. M. Elwes (1883). (id ethics-q2)
Portrait: Spinoza Ethica, Unknown, Public domain.
