The email from the student in my college writing class expressed urgency. It was the end of the semester, and he realized he needed a better grade to participate in sports. What could he do? He had missed some assignments, so I gave him two days to complete those papers and improve his grade. His response: “Thank you. I’ll do it.”

Two days—and the deadline—passed, and no papers appeared. He didn’t back up his words with action.

Jesus told about a young man who did something similar. The boy’s dad asked him to do some work in the vineyard. The son said,…