Plato 
Phaedrus [PDF ebook] 

The Phaedrus, written by Plato, is a dialogue between Plato's protagonist, Socrates, and Phaedrus, an interlocutor in several dialogues. The Phaedrus was presumably composed around 370 BC, about the same time as Plato's Republic and Symposium. 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.
The dialogue consists of a series of three speeches on the topic of love that serves as the subject to construct a discussion on the proper use of rhetoric. They encompass discussions of the soul, madness, divine inspiration, and the practice and mastery of an art.
As they walk out into the countryside, Socrates tries to convince Phaedrus to repeat the speech of Lysias which he has just heard. Phaedrus makes several excuses, but Socrates suspects strongly that Phaedrus has a copy of the speech with him. Saying that while Lysias is present, he would never allow himself to be used as a training partner for Phaedrus to practice his own speech-making on, he asks Phaedrus to expose what he is holding under his cloak. Phaedrus gives in and agrees to perform Lysias' speech.