Full Idea
Only an internal reason can actually motivate the agent to act.
Gist of Idea
Only an internal reason can actually motivate the agent to act
Source
John Searle (Rationality in Action [2001], Ch.6 App)
Book Reference
Searle,John R.: 'Rationality in Action' [MIT 2001], p.215
Related Idea
Idea 8257 Reason alone can never be a motive to any action of the will [Hume]