Bruma de oro, el occidente alumbra La ventana. El asiduo manuscrito Aguarda, ya cargado de infinito. Alguien construye a Dios en la penumbra. Un homb… - Benedictus de Spinoza

The first thinker to introduce the purely monistic conception of substance into science and appreciate its profound importance was the great philosopher Baruch Spinoza; his chief work appeared shortly before his death in 1677, just one hundred years before Lavoisier gave empirical proof of the constancy of matter by means of the chemist's principle instrument, the balance. In his stately pantheistic system the notion of the world (the universe, or the cosmos) is identical with the all-pervading notion of God; it is at one and the same time the purest and most rational monism and the clearest and most abstract monotheism. This universal substance, this “divine nature of the world,” shows us two different aspects of its being, or two fundamental attributes — matter (indefinitely extended substance) and spirit (the all-embracing energy of thought). All the changes which have since come over the idea of substance are reduced, on a logical analysis, to this supreme thought of Spinoza's; with Goethe I take it to be the loftiest, profoundest, and truest thought of all ages. [Original in German: Der erste Denker, der den reinen monistischen »Substanzbegriff« in die Wissenschaft einführte und seine fundamentale Bedeutung erkannte, war der große Philosoph Baruch Spinoza; sein Hauptwerk erschien kurz nach seinem frühzeitigen Tode, 1677,...]

...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.]

By the right and order of nature I merely mean the rules determining the nature of each individual thing by which we conceive it is determined naturally to exist and to behave in a certain way. For example fish are determined by nature to swim and big fish to eat little ones, and therefore it is by sovereign natural right that fish have possession of the water and that big fish eat small fish. For it is certain that nature, considered wholly in itself, has a sovereign right to do everything that it can do, i.e., the right of nature extends as far as its power extends…since the universal power of the whole of nature is nothing but the power of all individual things together, it follows that each individual thing has the sovereign right to do everything that it can do, or the right of each thing extends so far as its determined power extends.