faculty, extends to all the objects of the five senses. Similarly,
objects which are the subject-matter of different philosophical
sciences can yet be treated of by this one single sacred science under
one aspect precisely so far as they can be included in revelation. So
that in this way, sacred doctrine bears, as it were, the stamp of the
divine science which is one and simple, yet extends to everything.
_______________________

FOURTH ARTICLE [I, Q. 1, Art. 4]

Whether Sacred Doctrine Is a Practical Science?

Objection 1: It seems that sacred doctrine is a practical science; for
a practical science is that which ends in action according to the
Philosopher (Metaph. ii). But sacred doctrine is ordained to action:
"Be ye doers of the word, and not hearers only" (James 1:22).
Therefore sacred doctrine is a practical science.

Obj. 2: Further, sacred doctrine is divided into the Old and the
New Law. But law implies a moral science which is a practical science.
Therefore sacred doctrine is a practical science.

_On the contrary,_ Every practical science is concerned with human
operations; as moral science is concerned with human acts, and
architecture with buildings. But sacred doctrine is chiefly concerned
with God, whose handiwork is especially man. Therefore it is not a
practical but a speculative science.

_I answer that,_ Sacred doctrine, being one, extends to things which
belong to different philosophical sciences because it considers in