Potentiality for darkness is the domain of the potential in general. In Book Theta of Metaphysics, Aristotle writes, “Impotentiality [adynamia αδυναμία] is a privation contrary to potentiality. Thus all potentiality is impotentiality of the same and with respect to the same.” From this passage, Agamben credits Aristotle for articulating the originary structure of potentiality: all potentiality [dynamis δυναμις] is impotentiality [adynamia αδυναμία]. We are now far away from the standard, binary account of potentiality as that which is not-yet actual. Rather than emphasizing potentiality as that which can (and should) be actual, Agamben’s rhetorical gesture reverses the movement: it is no longer the teleological movement from potentiality to actuality, but the return of potentiality unto itself, the movement of potentiality to its own privation, its own non-Being. To say “all potentiality is impotentiality” means that what is potential can both be and not be. After all, were potentiality always only potential to be, everything potential would always already have been actualized, and potentiality in-itself would never exist as such. Agamben thus aims to focus our concentration on this “not-being” of potentiality, the impotentiality to be found at the very core of all potentiality. Agamben writes,