Into wholeness

Is it possible to desire or want something that we don't already in part have?  Can we desire God without already having his imprint.  Is there a vacuum that we try and put God into in order to fill us? Do we feel incomplete and seek God for completeness?  Or is there already a desire in us from birth to be united with that which breathed us out.  Is it more of a  homecoming that finding new territory? For me, this idea gives me hope because if I'm in the dark, I don't know where to grasp in order to reach light.  However if I have Christ already imprinted in my deepest being, then his guidance can lead me to where he also is.