Sunday Sermonette: David Hume
This week's Sunday Sermonette comes from the Scottish philosopher David Hume:
Reason is, and only ought to be, the slave of the passions, and can never pretend to any other office than to serve and obey them.
Update: I think I should offer a bit more context for this quote. Hume isn't saying that passion should override reason when the two are pulling in opposite directions. He's saying that reason is a tool for getting what you want, i.e., that reason can't dictate ultimate ends.