Meditations on First Philosophy is one of Descartess best-known works and among the most influential philosophical texts ever written. Composed of six meditations, it explores the dubiousness of thoughts and assumptions, the nature of the human mind, the existence of God, truth versus falsehood; the essence of material things and, finally, the difference between mind and body. This volume also includes the great philosophers Discourse on the Method, a brilliant discussion of reasoning and experimentation which helped establish the foundations of the scientific process, a selection of enlightening essays from his Principles of Philosophy as well as a classic introduction by Frank Sewall. One of the most important metaphysical writings, this collection is essential for anyone interested in the study of philosophy.