Full Idea
Every true act of will is also at once and without exception a movement of the body.
Gist of Idea
Every true act of will is also at once and without exception a movement of the body
Source
Arthur Schopenhauer (The World as Will and Idea [1819], II 018)
Book Reference
Schopenhauer,Arthur: 'The World as Will and Idea', ed/tr. Berman,Jill and David [Everyman 1995], p.32
A Reaction
The word 'act' seems to beg the question (as does 'true'!). I am no longer sure that I know what an act of will is. Hobbes says there is no such thing.