Plato 
Lysis 

Lysis is a dialogue of Plato which discusses the nature of philia (φιλία), often translated as friendship, while the word's original content was of a much larger and more intimate bond. It is generally classified as an early dialogue.

Plato (428/427 or 424/423 – 348/347 BC) was an Athenian philosopher during the Classical period in Ancient Greece, founder of the Platonist school of thought, and the Academy, the first institution of higher learning in the Western world.

Translator: Benjamin Jowett