According to Lacan's theory, human beings are driven by the desire of desire. Not a desire of a specific object, but a desire that cannot be fullfilled. Desire is the outcome of human's insertion in society and subjectivation through language. The promise of full enjoyment is what capitalism and consumerism play and work with constantly.
Desire is something that we want but that doesn't address any need. 'If we don't desire, life is meaningless' Jorgos Papadopoulos