It propounds for enquiry the _Good_, the Summum Bonum.

This is denied to be mere pleasure, and the denial is enforced by Sokrates challenging his opponent to choose the lot of an ecstatic oyster.

As usual, good must be related to Intelligence; and the Dialogue gives a long disquisition upon the One and the Many, the Theory of Ideas, the Determinate and the Indeterminate.

Good is a compound of Pleasure and Intelligence, the last predominating.

Pleasure is the Indeterminate, requiring the Determinate (Knowledge) to regulate it.