This book contains thirty texts from the best philosophical literature of all the ages; Thoughts of modes of existence and its' problems as written by the greatest philosophers: Plato, Aristotle, Anselm of Canterbury, Descartes, Kant, Hegel, Heidegger, Gottlob Frege, Whitehead, Russell, Willard Quine and many more. Most of these texts have been translated from five different languages especially for this volume. Edited, with an introduction and bibliographical notes by Abraham Zvie Bar-On.