In 45 BCE, the Roman statesman Cicero fell to pieces when his beloved daughter, Tullia, died from complications of childbirth. But from the depths of despair, Cicero fought his way back. In an effort to cope with his loss, he wrote a consolation speech—not for others, as had always been done, but for himself. And it worked. Cicero's Consolation was something new in literature, equal parts philosophy and motivational speech.

Intended to be a defense of the Christian religion, Pensées is a penetrating collection of thoughts on faith, reason, and theology. Unfinished at the time of Pascal's death, the book consists of philosophical fragments on the "wretchedness" of man and the controversial schisms of the church at the time. It includes the philosopher's infamous wager encouraging belief over agnosticism, as well as his thoughts on numerous other topics. Endlessly quotable, Pensées overflows with pearls of wisdom, each elusive sentence pregnant with a universe of thought.

The masterpiece of Rome's greatest poet, Virgil's Aeneid has inspired generations of readers and holds a central place in Western literature. The epic tells the story of a group of refugees from the ruined city of Troy, whose attempts to reach a promised land in the West are continually frustrated by the hostile goddess Juno. Finally reaching Italy, their leader, Aeneas, is forced to fight a bitter war against the natives to establish the foundations from which Rome is destined to rise.

Aristotle's Nicomachean Ethics, said to be dedicated to Aristotle's son, Nicomachus, is widely regarded as one of the most important works in the history of Western philosophy. Addressing the question of how men should best live, Aristotle's treatise is not a mere philosophical meditation on the subject, but a practical examination that aims to provide a guide for living out its recommendations.

Sir Francis Bacon, sometimes known as the father of empiricism, was one of the major political figures of his day, his career culminating as Lord Chancellor under King James I in 1617. Bacon wrote widely, but it is the Essays (published in its third edition in 1625, the year before his death) for which he is best known. Deftly written and often displaying a cutting wit, they cover a wide range of subjects including death, love, marriage, ambition and atheism.

Gorgias of Leontini, a famous teacher of rhetoric, has come to Athens to recruit students, promising to teach them how to become leaders in politics and business. A group has gathered at Callicles' house to hear Gorgias demonstrate the power of his art. This dialogue blends comic and serious discussion of the best life, providing a penetrating examination of ethics.

Entertaining and insightful, David Hume's Dialogues Concerning Natural Religion and The Natural History of Religion are considered to be among the most important philosophical works on the topic of religion. Each investigates the formation and consequences of religious belief.

As intriguing today as when it was first published, Hume's An Enquiry Concerning Human Understanding is a fascinating exploration into the nature of human knowledge. Using billiard balls, candles, and other colorful examples, Hume conveys the core of his empiricism - that true knowledge can be gained only through sensory experience.

This is an essay from the Favorite Essays collection.

Often considered the foundation of political liberalism, John Locke's Two Treatises of Government was first published anonymously in 1689, in the wake of England's Glorious Revolution. In The First Treatise of Government, Locke refutes the idea of divine monarchy, while The Second Treatise of Government articulates Locke's philosophy of government, which he based upon his theories of natural rights and the social contract.