The former is termed pure, the latter empirical
philosophy.
The philosophy of pure reason is either propaedeutic, that is, an
inquiry into the powers of reason in regard to pure a priori
cognition, and is termed critical philosophy; or it is, secondly,
the system of pure reason- a science containing the systematic
presentation of the whole body of philosophical knowledge, true as
well as illusory, given by pure reason- and is called metaphysic. This
name may, however, be also given to the whole system of pure
philosophy, critical philosophy included, and may designate the
investigation into the sources or possibility of a priori cognition,
as well as the presentation of the a priori cognitions which form a
system of pure philosophy- excluding, at the same time, all
empirical and mathematical elements.
Metaphysic is divided into that of the speculative and that of the
practical use of pure reason, and is, accordingly, either the
metaphysic of nature, or the metaphysic of ethics. The former contains
all the pure rational principles- based upon conceptions alone (and
thus excluding mathematics)- of all theoretical cognition; the latter,
the principles which determine and necessitate a priori all action.
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