Full Idea
A motive does have an aspect of desire, but it includes something about why a state of affairs is desired, and that includes something about the way my emotions are tied to my aim.
Gist of Idea
Motives involve desires, but also how the desires connect to our aims
Source
Linda Trinkaus Zagzebski (Virtues of the Mind [1996], II 2.6)
Book Reference
Zagzebski,Linda: 'Virtues of the Mind' [CUP 1996], p.131
A Reaction
It is standard usage that a 'motive' involves some movement towards achieving the desire, and not merely having the desire. I'd quite like to stand on top of Everest, but have absolutely no motivation to try to achieve it.