Full Idea
Dialectic occupies the highest position and forms, as it were, the copestone of the curriculum.
Gist of Idea
Dialectic is the highest and most important part of the curriculum
Source
Plato (The Republic [c.371 BCE], 534e)
Book Reference
Plato: 'Republic', ed/tr. Waterfield,Robin [OUP 1993], p.268