Written four years before the author's Meditations on First Philosophy, for 10 points, name this 1637 work of Ren?Descartes that contains the quotation, "I think, therefore I am."
In this work, the author suggests moving into a house of morality while rebuilding one's house of ideas and knowledge from its foundation.  This work details a four-part plan, including making complete lists, as a means towards understanding, supporting this rationalist approach over empirical observations.  It also modifies the position of skepticism to allow for an incontrovertible claim.  This work calls physics the "heart" and "soul of man" and argues for mind-body dualism.  Written four years before the author's Meditations on First Philosophy, for 10 points, name this 1637 work of Ren?Descartes that contains the quotation, "I think, therefore I am."
In this work, the author suggests moving into a house of morality while rebuilding one's house of ideas and knowledge from its foundation.  
Discourse on Method [accept Discourse on the Method]