The hypothesis held in the current study is that Descartes is truly concerned about moral matters; that his moral meditations involve a doctrine on the passions of the soul and a conception of life as well, both of them intrinsically tied up. Thus, my purpose is as follows: first, to show that it is possible to reconstruct crucial aspects of Descartes�s moral meditations after the analysis of his corpus doctrinae: that his moral stand involves a new conception of the passions. Secondly, I shall underline that ethos y pathos are connected in his views; that this connection is explicit in Descartes�s ideas of practical knowledge, namely, in the sort of praxis recon as «the exercise of virtue», the «vivre heureusement». Thirdly, I will approac...