The present research shows the need to rethink the metaphysical dualism, given the moment understanding reality from classical realism; That is to say that as entity and essence brings problems like falling into an excessive subjectivity because under this duality it is only possible to speak the world from the representation; A matter that becomes very problematic insofar as the world is reduced to the story the subject who represents it, because there is no reality as such because it is reduced to what is said the thing and this judgment does not necessarily correspond to the thing , Is simply his story. Now, the proposal for the rethinking the classic realism that bases the classical metaphysics I propose from the philosophical position the Spanish Xavier Zubiri, who from the noology like study the human intelligence models the concept reality from the apprehension with The term of his. This is not to say that reality is because it is apprehended, as Berkeley maintains with its esse est percepi, but that real things are because they have a character in their own, of their own. For this reason, the existence something can not be denied only because it has not been apprehended, the real thing exists because it has its own character, independent apprehension.