Full Idea
Reason alone can never be a motive to any action of the will.
Gist of Idea
Reason alone can never be a motive to any action of the will
Source
David Hume (Treatise of Human Nature [1739], II.III.3)
Book Reference
Hume,David: 'A Treatise of Human Nature', ed/tr. Mossner,Ernest C. [Penguin 1969], p.460
A Reaction
This is Hume's notorious total rejection of Socratic intellectualism, a stilleto in the back of the 'age of reason'. Hume thinks desire is the motivator. He's probably right. Why should truth motivate? See Idea 4421.
Related Ideas
Idea 4421 Philosophers have never asked why there is a will to truth in the first place [Nietzsche]
Idea 3839 Only an internal reason can actually motivate the agent to act [Searle]