Published shortly after his death, the 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. Following a logical step-by-step format, 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. The Ethics is presented in the standard translation of the work by Edwin Curley. This edition also includes an introduction by Stuart Hampshire, outlining Spinoza's philosophy and placing it in context.
Spinoza made a valiant attempt to rewrite Euclid's Elements, the foundational math book, but for social psychology. He ended up with nonsense. However, in the attempt, he was able at least in part to make a break from some -- though not all -- dogma of Abrahemic doctrine.
Perhaps the least interesting book I have ever attempted to listen to. I've listened to about 360 books over the past 5 years and this one i could not grasp any idea of what he was trying to explain. His idea of proof was impossible to comprehend and overall ridiculous. This is my humble opinion.