For Foucault, freedom refers to the indeterminateness of the constitutive matrix and to the contingency of all structures. It is the virtual fractures that appear in the invisible walls of our world, the opening up of possibilities for seeing how that which is might no longer be what it is. Freedom does not mean that everything is possible, but neither is the present a necessity. Foucault writes:

Even though freedom for Foucault is thus not an attribute of the subject, this does not commit us to political apathy and cynicism. Freedom is anarchic in the sense that it disturbs and even breaks every totality, but it must nevertheless not be understood as some absolute and mystical outside. The virtual fractures for thinking and being otherwise will not just appear in the invisible walls of our world, they can only emerge from our practices. We must try to open up possibilities for seeing to what extent that which is might no longer be what it is.