Letters on the English author of "Novum Organum" and father of experimental philosophy. Letter 13 is about John Locke and his theories on the immortality of the soul. Letter 14 compares British philosopher Isaac Newton to French philosopher René Descartes. Upon his death in 1727, Newton was compared to Descartes in a eulogy performed by French philosopher Fontenelle. While the British did not appreciate this comparison, Voltaire argues that Descartes, too, was a great philosopher and mathematician. Letter 15 focuses on Newton's law of universal gravitation. Letter 16 talks about Newton's work with optics. Letter 17 discusses Newton's work with geometry and his theories
Theosophy and Western philosophy a "pseudo-Theosophical" Society, because hers teaching "is untenable and false." Thus, modern Theosophy is a doctrine not only "anti-religious" and "anti-scientific," but also "antiphilosophic." A religious philosopher Sergius Bulgakov stated that [Blavatskian] Theosophy, trying to replace religion with itself, turns into a "vulgar pseudoscientific mythology." In Nikolai Berdyaev's opinion, "contemporary 'theosophical' movements" corrupted the beautiful word 'Theosophy' and "have made us forget" the existence of a genuine "Christian theosophy". He believed that modern Theosophy does not represent a synthesis of religion, philosophy and science, as its adherents say, but there is a "mixture" of them, in which there is no