Full Idea
Homer left out another mental action lying between coming to a conclusion and acting on it; and he did well, since there is no such action, and the idea is the invention of bad philosophy.
Gist of Idea
The 'will' doesn't exist; there is just conclusion, then action
Source
report of Homer (The Iliad [c.850 BCE]) by Bernard Williams - Shame and Necessity II - p.37
Book Reference
Williams,Bernard: 'Shame and Necessity' [California 1994], p.37
A Reaction
This is a characteristically empiricist view, which is found in Hobbes. The 'will' seems to have a useful role in folk psychology. We can at least say that coming to a conclusion that I should act, and then actually acting, are not the same thing.