treatment it requires, so as to be able to perform it with greater
facility and in the greatest perfection. Where the different kinds
of work are not distinguished and divided, where everyone is a
jack-of-all-trades, there manufactures remain still in the greatest
barbarism. It might deserve to be considered whether pure philosophy
in all its parts does not require a man specially devoted to it, and
whether it would not be better for the whole business of science if
those who, to please the tastes of the public, are wont to blend the
rational and empirical elements together, mixed in all sorts of
proportions unknown to themselves, and who call themselves independent
thinkers, giving the name of minute philosophers to those who apply
themselves to the rational part only- if these, I say, were warned not
to carry on two employments together which differ widely in the
treatment they demand, for each of which perhaps a special talent is
required, and the combination of which in one person only produces
bunglers. But I only ask here whether the nature of science does not
require that we should always carefully separate the empirical from
the rational part, and prefix to Physics proper (or empirical physics)
a metaphysic of nature, and to practical anthropology a metaphysic
of morals, which must be carefully cleared of everything empirical, so
that we may know how much can be accomplished by pure reason in both
cases, and from what sources it draws this its a priori teaching,
and that whether the latter inquiry is conducted by all moralists
(whose name is legion), or only by some who feel a calling thereto.

As my concern here is with moral philosophy, I limit the question
suggested to this: Whether it is not of the utmost necessity to
construct a pure thing which is only empirical and which belongs to
anthropology? for that such a philosophy must be possible is evident
from the common idea of duty and of the moral laws. Everyone must