Spinoza's works revolutionized the field of philosophy. In the distant 17th century, this man anticipated the advent of the Enlightenment and the modern form of democracy, became the founder of the historical-critical approach to the interpretation of Holy Scripture and laid the foundations of depth psychology. But above all, Spinoza developed a philosophical system based on the ability to correctly direct one's desires and thus achieve true joy - a system that completely changed our concept of God, morality and happiness. In many ways, this philosopher was ahead of not only his era, but also ours. This is precisely what is called the miracle of Spinoza. The book by the venerable French author Frederic Lenoir offers a subtle, brilliant analysis of Spinoza’s worldview, reflected in his main work, “Ethics” (1675), and other works, explores the biographical facts that influenced the formation of his philosophical system, and relationships with contemporaries. The book also contains valuable correspondence between the author and Robert Misrai, one of the largest modern researchers of Spinoza's philosophical heritage.