The main characters are Socrates, the boys Lysis and Menexenus who are friends, as well as Hippothales, who is in unrequited love with Lysis and therefore, after the initial conversation, hides himself behind the surrounding listeners.

The first part of the work is written in the Socratic dialectical style and Meno is reduced to confusion or aporia. In response to Meno's paradox (or the learner's paradox), however, Socrates introduces positive ideas: the immortality of the soul, the theory of knowledge as recollection (anamnesis), which Socrates demonstrates by posing a mathematical puzzle to one of Meno's slaves, the method of hypothesis, and, in the final lines, the distinction between knowledge and true belief.

Plato's best-known work, it has proven to be one of the world's most influential works of philosophy and political theory, both intellectually and historically.

The Phaedo, which depicts the death of Socrates, is also Plato's fourth and last dialogue to detail the philosopher's final days, following Euthyphro, Apology, and Crito.

Although ostensibly about the topic of love, the discussion in the dialogue revolves around the art of rhetoric and how it should be practiced, and dwells on subjects as diverse as metempsychosis (the Greek tradition of reincarnation) and erotic love.

Apart from Socrates, the primary speaker in Philebus, the other speakers are Philebus and Protarchus. But Philebus, who wants to defend the life of pleasure, hedonism, which Socrates describes as the life of an oyster, hardly participates, and his position has to be defended by Protarchus, who has learnt argumentation from Sophists.

The traditional subtitle (which may or may not be Plato's) is "or the Sophists." The main argument is between the elderly Protagoras, a celebrated Sophist, and Socrates.

ts main theme is to identify what a sophist is and how a sophist differs from a philosopher and statesman. Because each seems distinguished by a particular form of knowledge, the dialogue continues some of the lines of inquiry pursued in the epistemological dialogue, Theaetetus, which is said to have taken place the day before.

The text describes a conversation among Socrates, the mathematician Theodorus, another person named Socrates (referred to as "Young Socrates"), and an unnamed philosopher from Elea referred to as "the Stranger"

It concerns itself at one level with the genesis, purpose and nature of love, and (in latter-day interpretations) is the origin of the concept of Platonic love.