This monumental work stands alone. “As a work of constructive criticism it has never been surpassed. To every one and especially to philosophers and men of natural science, it is an amazing revelation of how the familiar terms with which they deal plunge their roots far into the darkness beneath the surface of common sense. It is a noble monument to the critical spirit of science and to the idealism of our time.” “Human Worth of Rigorous Thinking.” C. J. Keyser. (2) The physicist’s point of view: POINCARÉ, HENRI. “The Foundations of Science.” The Science Press, N. Y., 1913. Selection from contents: Science and hypothesis. Number and magnitude. Space. Force. Nature. II. The value of science. The mathematical sciences. The physical sciences. The objective value of science. III. Science and method. Science and the scientist. Mathematical reasoning. The new mechanics. Astronomic science. (3) The human, civilizing, practical life, point of view: KEYSER, CASSIUS J. “Science and Religion: The Rational and the Super-rational.” The Yale University Press. “The New Infinity and the Old Theology.” The Yale University Press. “The Human Worth of Rigorous Thinking.” Essays and Addresses. Columbia University Press, 1916. Selection from contents: The human worth of rigorous thinking. The human significance of mathematics. The walls of the world; or concerning the figure and the dimensions of the Universe of space. The universe and beyond. The existence of the hypercosmic. The axiom of infinity: A new presupposition of thought. Research in American Universities. Mathematical productivity in the United States. “Mathematical Philosophy, the Study of Fate and Freedom. Lectures for Educated Laymen.” Forthcoming Book.