Full Idea
He is free for whom all things happen in accordance with his choice, and whom no one can constrain.
Gist of Idea
Freedom is making all things happen by choice, without constraint
Source
Epictetus (The Discourses [c.56], 1.12.09)
Book Reference
Epictetus: 'The Discourses, The Handbook, Fragments', ed/tr. Gill,C [Everyman 1995], p.33
A Reaction
The idea of 'free' will seems to have resulted from a wide extension of the idea of constraint, with global determinism lurking in the background.
Related Idea
Idea 23327 Stoics expanded the idea of compulsion, and contracted what counts as one's own actions [Stoic school, by Frede,M]