A frequent misinterpretation portrays the elder brother as justified in his indignation, viewing him as unfairly overlooked for his loyalty compared to the wasteful younger son, which overlooks how his dutiful obedience stemmed from obligation rather than love and fails to recognize the parable's critique of legalism that resents God's mercy toward others; another error confines the lesson to Pharisees alone, ignoring its broader warning against any self-righteous attitude that excludes the repentant from grace.
Luke 15:28
King James Version (1769)
28 And he was angry, and would not go in: therefore came his father out, and intreated him.
In the parable of the prodigal son, the elder brother's anger and refusal to join the celebration illustrates the core truth of resentment arising from self-righteousness; despite his faithful service, his heart lacks joy in his father's merciful restoration of the wayward brother, emphasizing God's extravagant grace that welcomes repentant sinners and calls everyone to participate in divine celebration rather than bitterness.