The Dialogues of Plato rank with the writings of Aristotle as the most important and influential philosophical works in Western thought. In them Plato cast his teacher Socrates as the central disputant in colloquies that brilliantly probe a vast spectrum of philosophical ideas and issues.

The Apology of Socrates, written by Plato, is a Socratic dialogue of the speech of legal self-defense which Socrates spoke at his trial for impiety and corruption in 399 BC. Specifically, the Apology of Socrates is a defense against the charges of "corrupting the youth" and "not believing in the gods in whom the city believes, but in other daimonia that are novel" to Athens.

The Republic poses questions that endure: What is justice? What form of community fosters the best possible life for human beings? What is the nature and destiny of the soul? What form of education provides the best leaders for a good republic? What are the various forms of poetry and the other arts, and which ones should be fostered and which ones should be discouraged? How does knowing differ from believing?

Laches, a general in the Athenian army, saw Socrates fight bravely in the battle of Delium. When he and Nicias, another general, are asked to explain the idea of courage, they are at a loss, and words fail them. How does courage differ from thoughtless and reckless audacity? Can a lion be said to be courageous? What about small children who have little idea of the dangers they face? Should we call people courageous who do not know whether their bravery will produce good or bad consequences?

The Athenian court has found Socrates guilty and sentenced him to death. While he is waiting to be executed, his friend, Crito, comes to the prison to persuade him to escape and go into exile. Socrates responds by examining the essence of law and community, probing the various kinds of law and making distinctions that go far beyond the particular issue of whether or not Socrates should escape.

This simplistic and ingenious allegory from one of the fathers of Western philosophy casts light on society’s naiveté and ignorance.

The dramatic nature of Plato's dialogues is delightfully evident in Symposium. The marriage between character and thought bursts forth as the guests gather at Agathon's house to celebrate the success of his first tragedy. With wit and insight, they all present their ideas about love - from Erixymachus' scientific naturalism to Aristophanes' comic fantasy. The unexpected arrival of Alcibiades breaks the spell cast by Diotima's ethereal climb up the staircase of love to beauty itself.

Socrates is in prison, sentenced to die when the sun sets. In this final conversation, he asks what will become of him once he drinks the poison prescribed for his execution. Socrates and his friends examine several arguments designed to prove that the soul is immortal. This quest leads him to the broader topic of the nature of mind and its connection not only to human existence but also to the cosmos itself. What could be a better way to pass the time between now and the sunset?

In Euthyphro, Socrates is on his way to the court, where he must defend himself against serious charges brought by religious and political authorities. On the way he meets Euthyphro, an expert on religious matters who has come to prosecute his own father. Socrates questions Euthyphro's claim that religion serves as the basis for ethics. Euthyphro is not able to provide satisfactory answers to Socrates' questions, but their dialogue leaves us with the challenge of making a reasonable connection between ethics and religion.

The Greek word sumposion means a drinking party (a fact shamefully ignored by the organizers of modern symposia), and the party described in Plato's Symposium is one supposedly given in the year 416 BC by the playwright Agathon to celebrate his victory in the dramatic festival of the Lenaea. He has already given one party, the previous evening; this second party is for a select group of friends, and host and guests alike are feeling a little frail.

Phaedrus lures Socrates outside the walls of Athens, where he seldom goes, by promising to share a new work by his friend and mentor, Lysias, a famous writer of speeches. This dialogue provides a powerful example of the dialectical writing that Plato uses to manifest ideas that are essential to human existence and to living a good life. Phaedrus shows how oral and written forms of language relate to each other and to philosophy.

A dialogue between Socrates and Meno probes the subject of ethics. Can goodness be taught? If it can, then we should be able to find teachers capable of instructing others about what is good and bad, right and wrong, or just and unjust.

Selected from sermons delivered by C. S. Lewis during World War II, these nine addresses show the beloved author and theologian bringing hope and courage in a time of great doubt. "The Weight of Glory", considered by many to be Lewis’s finest sermon of all, is an incomparable explication of virtue, goodness, desire, and glory.

Continuing where Thus Spoke Zarathustra left off, Nietzsche's controversial work Beyond Good and Evil is one of the most influential philosophical texts of the 19th century and one of the most controversial works of ideology ever written. Attacking the notion of morality as nothing more than institutionalised weakness, Nietzsche criticises past philosophers for their unquestioning acceptance of moral precepts. Nietzsche tried to formulate what he called "the philosophy of the future".

Durant lucidly describes the philosophical systems of such world-famous “monarchs of the mind” as Plato, Aristotle, Francis Bacon, Spinoza, Kant, Voltaire, and Nietzsche. Along with their ideas, he offers their flesh-and-blood biographies, placing their thoughts within their own time and place and elucidating their influence on our modern intellectual heritage. This book is packed with wisdom and wit.