Full Idea
Something which is composed of two factors which are bad for different purposes and lies midway between them is better than either of the factors.
Gist of Idea
Something which lies midway between two evils is better than either of them
Source
Plato (Euthydemus [c.385 BCE], 306a)
Book Reference
Plato: 'Early Socratic Dialogues', ed/tr. Saunders,Trevor J [Penguin 1987], p.374