Contents: Introductory note by Ronald Suter, On the Structure of Scientific Theories by Carl G. Hempel, Stimulus and Meaning by W. V. Quine, Utilitarianism by J. O. Urmson, Aesthetics as the Middle Ground by Stuart Hampshire, On the Concept of a Moral Principle by Henry David Aiken, Is there an Existential A Priori? by John Wild, The Husserlain Conception of the Intentionality of Consciousness by Aron Gurwitsch, The Phenomenon of Reason by Quentin Lauer S.J., and The Riddle of Oedipus - Tragedy and Philosophy by Walter Kaufmann.