Spinoza's thought is completely idealistic when it is presented as negative thought, when it develops the bourgeois utopia, living it in the extreme,… - Benedictus de Spinoza

Well before John Stuart Mill, Spinoza had the acuity to recognize that the unfettered freedom of expression is in the state's own best interest. In this post-9/11 world, there is a temptation to believe that “homeland security” is better secured by the suppression of certain liberties than their free exercise. This includes a tendency by justices to interpret existing laws in restrictive ways and efforts by lawmakers to create new limitations, as well as a willingness among the populace, “for the sake of peace and security,” to acquiesce in this. We seem ready not only to engage in a higher degree of self-censorship, but also to accept a loosening of legal protections against prior restraint (whether in print publications or the dissemination of information via the Internet), unwarranted surveillance, unreasonable search and seizure, and other intrusive measures. Spinoza, long ago, recognized the danger in such thinking, both for individuals and for the polity at large. He saw that there was no need to make a trade-off between political and social well-being and the freedom of expression; on the contrary, the former depends on the latter.

...They [the Jews] have had the most painful history of all peoples, not without the fault of all of us, and when one owes to them the noblest man (Christ), the purest sage (Spinoza), the most powerful book, and the most effective moral law in the world. [Original in German: Trotzdem möchte ich wissen, wie viel man bei einer Gesamtabrechnung einem Volke nachsehen muß, welches, nicht ohne unser aller Schuld, die leidvollste Geschichte unter allen Völkern gehabt hat, und dem man den edelsten Menschen (Christus), den reinsten Weisen (Spinoza), das mächtigste Buch und das wirkungsvollste Sittengesetz der Welt verdankt.]

There is no substitute for knowledge, self-knowledge, or a metaphysical understanding of the score and one's relationship to it; and no amount of talent or even training can compensate for the lack of all these elements. 'Man thinks,' says Spinoza, and this thinking is the result of a dialogue between the intellect, the emotions and the intuition. This is not only true of the thinking of each individual, but of groups of people and even of nations.