Full Idea
Sound laws achieve the happiness of those who observe them.
Clarification
'Happiness' is the Greek word 'eudaimonia', also sometimes translated as 'flourishing'
Gist of Idea
Sound laws achieve the happiness of those who observe them
Source
Plato (The Laws [c.349 BCE], 631b)
Book Reference
Plato: 'The Laws', ed/tr. Saunders,Trevor J [Penguin 1970], p.55