The vacancy in your heart doesn't connotes that nobody is seeking for the job of servicing your feelings, but because the employee must first have all the necessary credentials needed for the job.

A writer reports on the universe. When he presents his credentials, the gates of heaven and hell are equally opened to him. He can hear the devil’s defense and god’s accusations. The guards at the king’s heart let him in. The writer can be anything and any one he wants. When he writes he is a god, he creates.