on Kant's Theory of Knowledge, ¹ and begs gratefully to
acknowledge his deep indebtedness. He owes much,
likewise, to CARDINAL MERCIER'S well-known treatise on
Criteriology, ² --the first serious attempt to vindicate the
superiority of the Scholastic theory of knowledge as com-
pared with the Kantian and other non-scholastic theories.
Finally, his acknowledgments are due to the Rev. PÈRE.
JEANNIÈRE, S.J., whose recently published Latin text-
book, ³ breathing the spirit and developing the teaching of
the Louvain neo-scholasticism, is in every way excellent,
and has been consulted with profit. Clear, comprehensive,
compendious, and extensively documented, it deserves a
wide welcome in Catholic colleges and seminaries.

For the rest, the doctrines and views propounded in
the present work are of course drawn from, and based
on, the rational principles embodied in the teaching of
St. Thomas Aquinas and the other great masters of the
traditional Aristotelian Scholasticism: which, it may per-
haps be necessary to observe, does not mean what non-
scholastic philosophers might be tempted to interpret it
as meaning, that those doctrines are presented for accept-
ance on the ground of authority. They are put forward
on their intrinsic merits, and by these alone they must be
judged.

As a rule the more advanced portions and detailed
discussions are printed in smaller type, so that these, as
well as certain sections or even whole chapters, may be
omitted or postponed for a second reading at the discre-
tion of the teacher when the book is being used for class

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