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, which ones should be fostered, and which ones should be discouraged? How does knowing differ from believing? Several characters in the dialogue present a variety of tempting answers to those...

David Hume's Dialogues Concerning Natural Religion had not yet been published when he died in 1776. Even though the manuscript was mostly written during the 1750s, it did not appear until 1779. The subject itself was too delicate and controversial, and Hume's dialectical examination of religious knowledge was especially provocative. What should we teach young people about religion? The characters Demea, Cleanthes, and Philo passionately present and defend three sharply different answers to...

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?

The dramatic nature of Plato's dialogues is delightfully evident in the "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 each present their ideas about love — from Erixymachus's 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...