The creative mathematician of the first order, an important scientific thinker Rene Descartes was an original metaphysician. He is also regarded as one of the key figures in the scientific revolution of the 17th century. Descartes is famous for his influential arguments which mainly concentrated on substance dualism, western philosophy and French philosophy. He took effort to discover a connection between geometry and algebra, which allowed for solving of geometrical problems by way of algebraic equations. In recognition to his contribution, he is referred as "father or founder father of modern philosophy". His most significant achievement was the use of algebraic formulas to describe geometric figures, which found a branch of mathematics known as analytical geometry. Here is this book we have made an effort to include his rare and inspiring quotes.