(Paperback)

The author was prepared to go to any lengths in his search for certainty - even to deny those things that seemed most self-evident. In this book, he developed a language of subjectivity that has lasted, and he also took his first steps towards the view that would eventually be expressed in epigram "Cogito, ergo sum" ("I think, therefore I am").

(Paperback)

Widely regarded as the father of modern Western philosophy, Descartes sought to look beyond established ideas and create a thought system based on reason. In this work, he meditates on doubt, the human soul, God, truth and the nature of existence itself.