Descartes inaugurated, in the Regulae, the ideal of a universal science by method. The Cartesian method consists above all of solving the questions in the most perfect way possible. To do this, the mind must base its solution on the experience of the real while ensuring that it is the most effective solution possible. In this sense, Descartes' method already has a metaphysical character, for the search for the most effective solution is not separated from the search for an absolute reality. Cartesian metaphysics, being the place where this ideal of method is best realized, bases this method on the experience of absolute reality. The cogito, ergo sum illustrates the power of the mind to orient itself through an inner experience of the mind o...