So they worshiped him and returned to Jerusalem with great joy,

And while they still could not believe it (because of their joy) and were amazed, he said to them, “Do you have anything here to eat?”

Then the seventy-two returned with joy, saying, “Lord, even the demons submit to us in your name!”

Those on the rock are the ones who receive the word with joy when they hear it, but they have no root. They believe for a while, but in a time of testing fall away.