the text is a presentation of gilles deleuze's interpretation of henri bergson's philosophy. it aims at focus on subjects that deleuzean philosophy should return to, developing them in différence et répetition and from this work. among the most outstandings, we find the affirmative ontology subject, that involves the passage from virtual to actual through being differentiation process. being doesn't stop to have existence by actualizing itself, but it differentiates itself in this process, being individualized as things. being is thus pre-individual and pre-subjective. in bergson, there should be a virtual coexistence of all differences degrees in duration.