Objectivity begins with the realization that man (including his every attribute
and faculty, including his consciousness) is an entity of a specific nature who
must act accordingly; that there is no escape from the law of identity, neither
in the universe with which he deals nor in the working of his own
consciousness, and if he is to acquire knowledge of the first, he must discover
the proper method of using the second; that there is no room for the
arbitrary in any activity of man, least of all in his method of
cognition—and just as he has learned to be guided by objective criteria in
making his physical tools, so he must be guided by objective criteria in
forming his tools of cognition: his concepts.