Full Idea
You can fetter my leg, but not even Zeus himself can get the better of my choice.
Gist of Idea
Not even Zeus can control what I choose
Source
Epictetus (The Discourses [c.56], 1.01.23)
Book Reference
Epictetus: 'The Discourses, The Handbook, Fragments', ed/tr. Gill,C [Everyman 1995], p.7
A Reaction
This is the beginnings of the idea of free will. It is based on the accurate observation that the intrinsic privacy of a mind means that no external force can be assured of controlling its actions. Epictetus failed to think of internal forces.