Let's analyze its connection with the verse:
Matthew 19:17
"And he said to him, 'Why do you call me good? There is no one good but one, that is, God. But if you want to enter into life, keep the commandments.'"
By stating, "Why do you call me good? There is no one good but one, that is, God," Jesus is indicating that true and absolute goodness belongs to God. When applying this to the Parable of the Workers in the Vineyard, it suggests that the owner of the vineyard, represented by the householder, is God, who is inherently good.
The moral of the parable emphasizes the generosity and grace of God, which does not adhere to human standards of reward and merit. The workers hired at different times of the day represent people coming to faith at different stages in their lives. The central message is that God extends His grace to all, regardless of when they respond to His call.
The first workers who murmur against the householder demonstrate an attitude of envy and discontent. This reflects the human tendency to measure justice and reward based on human criteria, forgetting about divine grace. The response of the vineyard owner, asserting his right to do as he pleases with what is his, underscores God's sovereignty in the distribution of His grace.
The underlying message is that God's economy transcends human notions of deserving. God, being good and gracious, offers everyone the opportunity to receive His blessing, regardless of when or how they come to faith. The ultimate lesson is about accepting God's generosity with gratitude rather than envying or questioning His justice, acknowledging that He alone is truly good.