This article aims to explore more in depth the ontological sense of freedom in Being and Nothingness by Jean-Paul Sartre. The intentionality in the for-oneself is thus used as a desire to integrate into being, i.e. recovering and keeping the tension between freedom and consciousness of Nothingness and Being. Although the useless passion in the 'for-oneself is presented as a defeat to the freedom, it is necessary to recover the ontological character of its actions.