In the analyses presented thus far, perception played no role except that of a paradigmatic example, since the objective of those analyses was to bring out the fundamental structure of consciousness. The essential nature of the latter has been seen in the opposition and correlation between a multiplicity and something identical. The most elementary, as well as the most fundamental, form of this opposition, which the noetico-noematic parallelism is, has been delved into, without however our having failed to appeal to other forms. It is thus that we have alluded to the fact that the same thing may present itself under the same aspect, sometimes in perception, sometimes in recollection, sometimes in expectation, sometimes in representation, etc.