But we may forget that the older brother didn't sin in staying with his father. Unlike his younger brother, he had been faithful to their father. He did right, but he did it for the wrong reason. This was exposed when his younger brother came home:
Look! All these years I’ve been slaving for you and never disobeyed your orders. Yet you never gave me even a young goat so I could celebrate with my friends. But when this son of yours who has squandered your property with prostitutes comes home, you kill the fattened calf for him!His sin lay in his not having his father's heart for the lost. By choice he stayed outside the party his father was throwing for his brother's homecoming. The older brother's self-righteousness consoled him. That good-for-nothing brother was back and was given a heroes' welcome. What's wrong with the world! Am I the only one who sees this injustice?!
Would we rather feel superior or feel forgiveness? The parable makes us count the cost of the gospel. We should want to be faithful, but in being faithful their is a temptation to be prideful. Let's be faithful but love mercy, because we all need both.