She opened, and He was gone, and the empty doorway is its own hard teacher. The little hesitation while comfort held her had cost her the meeting. This is the wound of the postponed yes, the heart that means to answer God but waits one moment too long.
The cure is quicker feet next time, and the search itself is already part of the finding. Her heart went out at His voice, and that pull came from somewhere. Even in the absence He is the one drawing her through the empty streets, present as the very longing that will not let her rest.