Full Idea
Self-discipline and excessive pleasure cannot go together, because pleasure deranges people just as much as distress. Excessive pleasure cannot partner any of the other virtues.
Gist of Idea
Excessive pleasure deranges people, making the other virtues impossible
Source
Plato (The Republic [c.371 BCE], 402e)
Book Reference
Plato: 'Republic', ed/tr. Waterfield,Robin [OUP 1993], p.101
A Reaction
This invites an examination of the word 'excessive', which seems too subjective. Aristotle says any good is improved by the addition of pleasure. Pleasure can certainly derange people.