Classical Greek philosophy

The cosmos (UK /ˈkɒzmɒs/, US /ˈkɒzmoʊs/) is the universe regarded as a complex and orderly system; the opposite of chaos.

The Cyrenaics or Kyrenaics (Ancient Greek: Κυρηναϊκοί; Kyrēnaïkoí) were a sensual hedonist Greek school of philosophy founded in the 4th century BCE, supposedly by Aristippus of Cyrene, although many of the principles of the school are believed to have been formalized by his grandson of the same name, Aristippus the Younger.

The Symposium (Greek: Συμπόσιον) is a Socratic dialogue written by Xenophon in the late 360's B.

Pneuma (πνεῦμα) is an ancient Greek word for "breath", and in a religious context for "spirit" or "soul".

Musica universalis (literally universal music), also called Music of the spheres or Harmony of the Spheres, is an ancient philosophical concept that regards proportions in the movements of celestial bodies—the Sun, Moon, and planets—as a form of musica (the Medieval Latin term for music).

Arete (Greek: ἀρετή), in its basic sense, means "excellence of any kind".

The Apology of Socrates to the Jury (Greek: Ἀπολογία Σωκράτους πρὸς τοὺς Δικαστάς), by Xenophon of Athens, is a Socratic dialogue about the legal defence that the philosopher Socrates presented at his trial for the moral corruption of Athenian youth; and for asebeia (impiety) against the pantheon of Athens; judged guilty, Socrates was sentenced to death.

Ancient Greek philosophy arose in the 6th century BC and continued throughout the Hellenistic period and the period in which Ancient Greece was part of the Roman Empire.

The Apology of Socrates (Greek: Ἀπολογία Σωκράτους, Apologia Sokratous, Latin: Apologia Socratis), by Plato, is the Socratic dialogue that presents the speech of legal self-defence, which Socrates presented at his trial for impiety and corruption, in 399 BC.

Nous (British: /ˈnaʊs/; US: /ˈnuːs/), sometimes equated to intellect or intelligence, is a philosophical term for the faculty of the human mind which is described in classical philosophy as necessary for understanding what is true or real.

Memorabilia (original title in Greek: Ἀπομνημονεύματα, Apomnemoneumata) is a collection of Socratic dialogues by Xenophon, a student of Socrates.

The Symposium (Ancient Greek: Συμπόσιον) is a philosophical text by Plato dated c.

The Physics (Greek: Φυσικὴ ἀκρόασις Phusike akroasis; Latin: Physica, or Physicae Auscultationes, meaning "lectures on nature") of Aristotle is one of the foundational books of Western science and philosophy.

The Peripatetic school was a school of philosophy in Ancient Greece.

The Oeconomicus (Greek: Οἰκονομικός) by Xenophon is a Socratic dialogue principally about household management and agriculture.

Sophism is a method of teaching.

Chaos (Greek χάος, khaos) refers to the formless or void state preceding the creation of the universe or cosmos in the Greek creation myths, or to the initial "gap" created by the original separation of heaven and earth.

In religion, ensoulment is the moment at which a human being gains a soul.