This investigation unifies and explains the different characteristics of time by carefully examining the stepwise construction of an internal model of the external world. An attempt to clarify the nature, origin, and types of time from a neurological perspective is heterodox, but, since the external world can be known only as an internal reconstruction, and since the reconstruction machinery is neurological, this novel approach may be heuristic. It will be seen that the origin of time is intimately related to sensible objects — a relation traditionally considered to be unequal or nonexistent. Since the birth of western philosophy in ancient Greece, an understanding of objects and time has been sought in their ontology —i.e., whether they are real or ideal— and as a consequence their relationship, if any, has been subordinate. However, the process of internal reconstruction demonstrates that objects and time are complementary in the rigorous sense of the term—both arise from a single neurological process. This common origin suggests a hierarchy of types of time concomitant with a hierarchy of increasing generalization of objects. The elements of this hierarchy will be seen to correspond to types of time that have been previously identified.