Full Idea
Medicine heals diseases of the body, wisdom frees the soul from passions.
Clarification
'Soul' is the Greek word 'psuché', which covers mind and consciousness and life
Gist of Idea
Wisdom creates a healthy passion-free soul
Source
Democritus (fragments/reports [c.431 BCE], B031), quoted by Clement - Pedagogue 1.6.2.1
Book Reference
'Ancilla to the Pre-Socratic Philosophers', ed/tr. Freeman,Kathleen [Harvard 1957], p.99
A Reaction
The interesting concept of a healthy mind seems to have got lost in modern moral philosophy.