In the previous chapters, Leibniz's concept of simple reflection has been identified with a transition from what is in the present into immediate memory, and appetites have been suggested to be differential predispositions referring to the possibility of bringing about something in the immediate future. Hence, the most pervasive processes or dynamics involved in perception are some kind of temporal projections or adumbrations. There is some sort of a double directedness of perception toward the immediate past and the immediate future.