A beautiful question from Michelle Olson:
Is desire connected to action and longing to being static?
Acting on desire may bring you to the object of your desire. You are then the subject acting upon the object, with full authority over your action. Longing suggests that what you long for is beyond your capacity. You are thus the object, your actions impaled under the authority of another's gaze.
I hate all those dance images with dancers longing for something outside of themselves: their throats exposed, chest stretched out, perhaps in the hopes of opening the cages of their heart. But that heart is just most likely getting minced through the sternum.