Enough is as good as a feast.

Meaning: Contentment with sufficiency brings the same satisfaction as abundance without the excess.

Origin: Chaucer's The Nun's Priest's Tale already has sufficiency as good as a feast, Sir Thomas Malory's Le Morte d'Arthur (c. 1470) has a version, and John Heywood's 1546 collection gives the exact wording "Enough is as good as a feast." It is a rebuke to greed: more than enough adds nothing.