Ética : demostrada según el orden geométrico

Written in the form of a treatise on geometry (definitions, axioms, propositions, proofs), the work explores, step by step, the nature of God, the origin of the mind, the mechanics of the emotions, and the arduous path toward human freedom. It is a conceptual architecture of imposing elegance—yet one that Unamuno read as "a desperate elegiac poem." For what Spinoza demonstrates is that God exists but does not listen to us; that good and evil are human categories with no counterpart in Nature; and that salvation, if it exists at all, lies not in another world but in the clearest possible understanding of our own. This edition includes an introduction and translation by Vidal Peña—one of the most rigorous and passionate guides to Spinoza available in Spanish—who reminds us that the *Ethics* is not a monument to be viewed from afar. It is a book to be reread, debated, and challenged—and one that, if one is lucky, changes everything.