Did Spinoza really say "Freedom is the recognition of necessity"?

No. The sentence never appears in the Ethics, the book it is always pinned to. It descends from Friedrich Engels writing about Hegel two centuries later, and somewhere along the way the attribution slid to the more famous determinist.

The version going around

"Freedom is the recognition of necessity." - attributed to Baruch Spinoza, usually dated 1677

It shows up on quote sites, lecture slides, and posters, almost always pinned to the Ethics.

The receipt

Search the standard English translation of the Ethics (R. H. M. Elwes, 1883) from end to end and the phrase "recognition of necessity" never appears. We ran that search against the full text before publishing this page.

The sentence's real ancestor is Engels, in Anti-Duhring (1878), in the chapter titled "Morality and Law. Freedom and Necessity." And he was crediting Hegel:

"Hegel was the first to state correctly the relation between freedom and necessity. To him, freedom is the insight into necessity." - Friedrich Engels, Anti-Duhring, 1878, Part I, Ch. XI

Later English renderings loosened "insight into" toward "recognition of," and the name attached to the sentence drifted from Hegel to Spinoza. So the internet's favorite Spinoza quote is a paraphrase of Engels summarizing Hegel.

Why the mistake is easy to make

Spinoza really did teach something in the neighborhood. He held that everything follows from necessity, and that freedom means understanding necessity rather than escaping it. His own definition, from Part I of the Ethics:

"That thing is called free, which exists solely by the necessity of its own nature, and of which the action is determined by itself alone." - Spinoza, Ethics, Part I, Definition VII, trans. Elwes

The misattribution compresses a real family resemblance between three philosophers into one tidy sentence. The idea has a real history. The quote does not.

The Spinoza line worth keeping

If you want a sentence of his to carry instead, take the one he actually closed the Ethics with:

"But all things excellent are as difficult as they are rare." - Spinoza, Ethics, Part V, closing note, trans. Elwes

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Lumoro sends one morning text a day: a verified quote, a plain reading of what it meant, and one small thing to do with it. Every line is checked against the original source before it reaches a phone. Quotes that fail the check do not ship. Some of them end up here instead.