fixing the limits of thought. The most sinewy brain cannot scale those adamantine barriers that convert reason’s highway into a “no thoroughfare.” (Dr. Howard Duffield.) The failure of worldly philosophy:—Lessing, after toiling at the task of establishing a morality which should be independent of revelation, confesses his failure in this plaintive cry: “If any one can convince me that Christianity is true he will confer on me the greatest benefit that one can offer to another.” Insufficiency of philosophy: