Full Idea
Intelligence is produced by teaching, involves truth and reason, and cannot be moved; true opinion involves persuasion, is irrational and can be moved.
Gist of Idea
Intelligence is the result of rational teaching; true opinion can result from irrational persuasion
Source
Plato (Timaeus [c.362 BCE], 51e)
Book Reference
Plato: 'Timaeus and Critias', ed/tr. Lee,Desmond [Penguin 1971], p.71