The Philebus is a Socratic dialogue written in the 4th century BC by Plato. Besides Socrates (the main speaker) the other interlocutors are Philebus and Protarchus. Philebus who advocates the life of physical pleasure (hedonism) hardly participates and his position is instead defended by Protarchus who learnt argumentation from Sophists. Socrates proposes there are higher pleasures (such as those of the mind) as well as lower ones and asks if the best life isn't one that optimally mixes both.