Originally published in 1920, this title wrestles with the critical conflict in modern philosophy of whether philosophers should employ pure reason in a world of abstracts or, rather, should rely upon experience and rationality to examine the actual world. Hoernlé argues for the latter and emphasises the importance of metaphysics in the intellectual quest for knowing reality. This title is ideal for students of philosophy and provides insightful background into the diverging philosophical views of the early 20th century.