Hope is an affective relation to an unknown future. Similarly, nostalgia is an effective relation to a fragmented past.

If the mind, our reasoning self, fails to grasp other realities than the one we are living right now, it is our affects that are moved by a nostalgic relation to a past and a hopeful grasp of the future that allow us to turn towards imaginative scenarios of reinventing the present.

Although nostalgia and hope can both be used as excuses for disengaging with the present because of a belief that "nothing new can be good enough" or that "the old is outdated", it is that affective potential to grasp that which is not here or not-yet-here that is actually radical.