Aristotle's Metaphysics was the first major study of the subject of metaphysics - in other words, an inquiry into 'first philosophy', or 'wisdom'. It differs from Physics which is concerned with the natural world: things which are subject to the laws of nature, things that move and change, are measurable. In Metaphysics, the study falls on 'being qua being' - being insofar as it is being; the causes and principles of being, the causes and principles of substances.

The Enchiridion is a collection of the most profound teachings of Epictetus (c. 55-135 AD), who taught that philosophy is a way of life and not just a matter of theory. The Enchiridion is a canonical text of Stoic philosophy, and contains all the fundamentals. Among them is the principle of not being concerned with that which is out of one’s control. Misfortune should not disturb the individual at all, and should not be perceived negatively.  

Henry David Thoreau's classic essay inspired Martin Luther King, Mohandas Karamchand Gandhi, and many other activists.

Aristotle's Poetics (335 BCE) is the earliest surviving work of dramatic theory and first surviving philosophical treatise on dramatic or literary theory. The work begins with a preliminary discourse on tragedy, epic poetry, and comedy as the chief forms of imitative poetry. By "imitative", Aristotle means the imitation of action in words as a creative process. He distinguishes comedy, tragedy, the satyr play, lyric poetry, and epic poetry by their differences in musical rhythm, harmony, meter, melody, nature of the characters, and the manner in which the narrative is presented.

Aristotle considers ‘the principles and causes of change, or movement’ behind both animate and inanimate things. It is philosophy, not science, but over centuries affected the views of those involved in the ‘natural sciences’. The text emerged from the Lyceum, the school founded by Aristotle, and is accepted to be a compilation of texts, some of which - but perhaps not all - is by Aristotle. Regardless of authorship, its importance is unquestioned.

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?

Written in Greek by an intellectual Roman emperor without any intention of publication, the Meditations of Marcus Aurelius offer a wide range of fascinating spiritual reflections and exercises developed as the leader struggled to understand himself and make sense of the universe. Spanning from doubt and despair to conviction and exaltation, they cover such diverse topics as the question of virtue, human rationality, the nature of the gods and Aurelius's own emotions. 

Left unfinished at the time of his death, The Autobiography of Benjamin Franklin has endured as one of the most well-known and influential autobiographies ever written. From his early years in Boston and Philadelphia to the publication of his Poor Richard's Almanac to the American Revolution and beyond, Franklin's autobiography is a fascinating, personal exploration into the life of America's most interesting founding father.

In this short and powerful book, celebrated philosopher Martha Nussbaum makes a passionate case for the importance of the liberal arts at all levels of education. Historically, the humanities have been central to education because they have been seen as essential for creating competent democratic citizens. But recently, Nussbaum argues, thinking about the aims of education has gone disturbingly awry in the United States and abroad.

The Anti-Federalist Papers is the collective name given to works written by the Founding Fathers who were opposed to or concerned with the merits of the United States Constitution of 1787. Starting on 25 September 1787 (8 days after the final draft of the US Constitution) and running through the early 1790s, these anti-Federalists published a series of essays arguing against a stronger and more energetic union as embodied in the new Constitution.