3. The nominal and real essence different.
For, though perhaps voluntary motion, with sense and reason, joined to
a body of a certain shape, be the complex idea to which I and others annex the name man, and so be the nominal
essence of the species so called: yet nobody will say that complex idea is the real essence and source of all those
operations which are to be found in any individual of that sort. The foundation of all those qualities which are the
ingredients of our complex idea, is something quite different: and had we such a knowledge of that constitution of
man, from which his faculties of moving, sensation, and reasoning, and other powers flow, and on which his so
regular shape depends, as it is possible angels have, and it is certain his Maker has, we should have a quite other
idea of his essence than what now is contained in our definition of that species, be it what it will: and our idea of
any individual man would be as far different from what it is now, as is his who knows all the springs and wheels
and other contrivances within of the famous clock at Strasburg, from that which a gazing countryman has of it,
who barely sees the motion of the hand, and hears the clock strike, and observes only some of the outward
appearances.
