Nature is satisfied with little; and if she is, I am also.

- Baruch Spinoza
Source: As quoted in The Story of Philosophy (1933) by Will Durant, p. 176

Here are what other notable people have said about Spinoza:

Albert Einstein:

How much do I love that noble man More than I could tell with words I fear though he’ll remain alone With a holy halo of his own.

Source: Albert Einstein, in “Zu Spinozas Ethik” (1920), a poem written in admiration of Spinoza, as quoted in Einstein and Religion (1999) by Max Jammer “Einstein’s Poem on Spinoza” (with scans of original German manuscript) at Leiden Institute of Physics, Leiden University: http://www.lorentz.leidenuniv.nl/history/Einsteins_poem/Spinoza.html

Arthur Schopenhauer:

[From Schopenhauer’s assessments of other philosophers] Bruno and Spinoza are to be entirely excepted. Each stands by himself and alone; and they do not belong either to their age or to their part of the globe, which rewarded the one with death, and the other with persecution and ignominy. Their miserable existence and death in this Western world are like that of a tropical plant in Europe. The banks of the Ganges were their spiritual home ; there, they would have led a peaceful and honoured life among men of like mind.

Source: Arthur Schopenhauer, in The World as Will and Representation (1818; 1844), Vol. I, p. 422, n. 2

Bertrand Russell:

SPINOZA (1634–77) is the noblest and most lovable of the great philosophers. Intellectually, some others have surpassed him, but ethically he is supreme.

Source: Bertrand Russell, in The History of Western Philosophy, Ch. X, p. 569

Friedrich Nietzsche:

I am utterly amazed, utterly enchanted! I have a precursor, and what a precursor! I hardly knew Spinoza : that I should have turned to him just now, was inspired by “instinct”. Not only is his overtendency like mine — namely, to make all knowledge the most powerful affect — but in five main points of his doctrine I recognize myself ; this most unusual and loneliest thinker is closest to me precisely in these matters : he denies the freedom of the will, teleology, the moral world-order, the unegoistic, and evil. Even though the divergencies are admittedly tremendous, they are due more to the difference in time, culture, and science. In summa: my lonesomeness, which, as on very high mountains, often made it hard for me to breathe and make my blood rush out, is now at least a twosomeness. Strange!

Source: Friedrich Nietzsche, in a postcard to Franz Overbeck, Sils-Maria (30 July 1881) as translated by Walter Kaufmann in The Portable Nietzsche (1954)

Richard Feynman:

My son is taking a course in philosophy, and last night we were looking at something by Spinoza and there was the most childish reasoning! There were all these attributes, and Substances, and all this meaningless chewing around, and we started to laugh. Now how could we do that? Here’s this great Dutch philosopher, and we’re laughing at him. It’s because there’s no excuse for it! In the same period there was Newton, there was Harvey studying the circulation of the blood, there were people with methods of analysis by which progress was being made! You can take every one of Spinoza’s propositions, and take the contrary propositions, and look at the world and you can’t tell which is right.

Source: Richard Feynman, in The Pleasure of Finding Things Out (1999), Ch. 9. The Smartest Man in the World.

More Spinoza quotes: http://www.quotescosmos.com/people/Baruch-Spinoza.html