This Collection includes most notable works of Baruch Spinoza - Ethics, Theologico-Political Treatise, On the Improvement of the Understanding. Ethics is undoubtedly Spinoza's greatest work - an elegant, fully cohesive cosmology derived from first principles, providing a coherent picture of reality, and a guide to the meaning of an ethical life, it defines in turn the nature of God, the mind, the emotions, human bondage to the emotions, and the power of understanding - moving from a consideration of the eternal, to speculate upon humanity's place in the natural order, the nature of freedom and the path to attainable happiness. A powerful work of elegant simplicity, the Ethics is a brilliantly insightful consideration of the possibility of redemption through intense thought and philosophical reflection. In Theologico-Political Treatise, Spinoza argues for the separation of theology and philosophy insisting that whereas the goal of theology is obedience, philosophy aims at understanding rational truth. Spinoza believes that in order for man to realize his full potential a society organized around the principles of reason is necessary. Tractatus de Intellectus Emendatione, or On the Improvement of the Understanding is an attempt to formulate a philosophical method that would allow the mind to form the clear and distinct ideas that are necessary for its perfection. It contains, in addition, reflection upon the various kinds of knowledge, an extended treatment of definition, and a lengthy analysis of the nature and causes of doubt. He discusses, among other topics, perception, experience, intelligence, memory, and forgetting.