A shift in paradigms occurred: Nietzsche and Ebbinghaus presupposed forgetfulness, rather than memory and its capacity, in order to place the medium of the soul against a background of emptiness or erosion. A zero value is required before acts of memory can be quantified. Ebbinghaus banned introspection and thus restored the primacy of forgetting on a theoretical level. On the one hand, there was Nietzsche’s delirious joy at forgetting even his forgetfulness; on the other, there was a psychologist who forgot all of psychology in order to forge its algebraic forumula.
– Friedrich Kittler, Discourse Networks 1800/1900, trans. Michael Mettler, Stanford: Stanford Univ. Press, 1990, 207.