Principles of Philosophy (Principia philosophiae) is a book by René Descartes. It is basically a synthesis of the Discourse on Method and Meditations on First Philosophy It was written in... More > Latin, published in 1644 and dedicated to Elisabeth of Bohemia, with whom Descartes had a long standing friendship. This book contains translation from the Original Texts, with a new introductory Essay, Historical and Critical by John Veitch and a Special Introduction by Frank Sewall.
When we further reflect on the various ideas that are in us, it is easy to perceive that there is not much difference among them, when we consider them simply as certain modes of thinking, but that they are widely different, considered in reference to the objects they represent; and that their causes must be so much the more perfect according to the degree of objective perfection contained in them.< Less
The Discourse on the Method is a philosophical and autobiographical treatise written by René Descartes. Its full name is Discourse on the Method of Rightly Conducting One's Reason and of... More > Seeking Truth in the Sciences. The Discourse on The Method is best known as the source of the famous quotation "I think, therefore I am", which occurs in Part IV of the work.
The Discourse on the Method is one of the most influential works in the history of modern philosophy, and important to the evolution of natural sciences. In this work, Descartes tackles the problem of skepticism, which had previously been studied by Sextus Empiricus, Al-Ghazali and Michel de Montaigne. Descartes modified it to account for a truth he found to be incontrovertible. Descartes started his line of reasoning by doubting everything, so as to assess the world from a fresh perspective, clear of any preconceived notions.< Less